[国际标准]ASMEB1.3M-1992螺纹测量体系的可接受尺寸.英制和米制螺纹标准
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[国际标准]ASMEB1.3M-1992螺纹测量体系的可接受尺寸.英制和米制螺纹标准,国际标准,ASMEB1,1992,螺纹,测量,体系,可接受,尺寸,英制,米制,标准
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中华人民共和国国家标准环境管理体系 规范及使用指南Environmental management systemsSpecification with guidance for use GB/T 24001-1996 idt ISO 14001:19961.范围 本标准规定了对环境管理体系的要求，使一个组织能够根据法律要求和重大环境影响信息，制定环境方针与目标。它适用于那些可为组织所控制，以及可能希望组织对其施加影响的环境因素。但它本身并未提出具体的环境表现（行为）准则。 本标准适用于任何有下列愿望的组织： a）实施、保持并改进环境管理体系； b）使自己确信能符合所声明的环境方针； c）向外界展示符合性； d）寻求外部组织对其环境管理体系的认证/注册； e）对符合本标准的情况进行自我鉴定和自我声明。 本标准中所有的要求都适用于任何一个环境管理体系。其应用程度取决于组织的环境方针、活动性质、运行条件等因素。本标准还在附录A中对如何使用本规范提供了提示性的指南。 对于本标准的任何应用，都应明确界定其范围。 注:为使用方便起见，“规范”部分和附录A中的条目采用了互相对应的序号，例如，4.3.3和A3.3的内容都是关于环境目标和指标的叙述, 4.5.4和A5.4的内容都是关于环境管理体系审核等。 2. 引用标准 目前尚无引用标准。 3. 定义 下列定义适用于本标准： 3.1 持续改进 continual improvement 强化环境管理体系的过程，目的是根据组织的环境方针，实现对整体环境表现（行为）的改进。 注:该过程不必同时发生于活动的所有方面。 3.2 环境 environment 组织运行活动的外部存在，包括空气、水、土地、自然资源、植物、动物、人，以及它们之间的相互关系。 注:从这一意义上,外部存在从组织内延伸到全球系统。 3.3 环境因素 environmental aspect 一个组织的活动、产品或服务中能与环境发生相互作用的要素。 注:重要环境因素是指具有或能够产生重大环境影响的环境因素。 3.4 环境影响 environmental impact 全部或部分地由组织的活动、产品或服务给环境造成的任何有害或有益的变化。 3.5 环境管理体系 environmental management systems 整个管理体系的一个组成部分，包括为制定、实施、实现、评审和保持环境方针所需的组织机构、计划活动、职责、惯例、程序、过程和资源。 3.6 环境管理体系审核 environmental management system audit 客观地获取审核证据并予以评价，以判断组织的环境管理体系是否符合所规定的环境管理体系审核准则的一个以文件支持的系统化验证过程，包括将这一过程的结果呈报管理者。 3.7 环境目标 environmental objective 组织依据其环境方针规定自己所要实现的总体环境目的，如可行应予以量化。 3.8 环境表现（行为） environmental performance 组织基于其环境方针、目标和指标，对它的环境因素进行控制所取得的可测量的环境管理体系结果。 3.9 环境方针 environmental policy 组织对其全部环境表现（行为）的意图与原则的声明，它为组织的行为及环境目标和指标的建立提供了一个框架。 3.10 环境指标 environmental target 直接来自环境目标，或为实现环境目标所需规定并满足的具体的环境表现（行为）要求，它们可适用于组织或其局部，如可行应予以量化。 3.11 相关方 interested party 关注组织的环境表现（行为）或受其环境表现（行为）影响的个人或团体。 3.12 组织 organization 具有自身职能和行政管理的公司、集团公司、商行、企事业单位、政府机构或社团，或是上述单位的部分或结合体，无论其是否法人团体、公营或私营。 注:对于拥有一个以上运行单位的组织，可以把一个运行单位视为一个组织。 3.13 污染预防 prevention of pollution 旨在避免、减少或控制污染而对各种过程、惯例、材料或产品的采用，可包括再循环、处理、过程更改、控制机制、资源的有效利用和材料替代等。 注:污染预防的潜在利益包括减少有害的环境影响、提高效益和降低成本。 4 环境管理体系要求 4.1 总要求 组织应建立并保持环境管理体系。本章描述了对环境管理体系的要求。 4.2 环境方针 最高管理者应制定本组织的环境方针并确保它: a) 适合于组织活动、产品或服务的性质、规模与环境影响； b) 包括对持续改进和污染预防的承诺； c) 包括对遵守有关环境法律、法规和组织应遵守的其它要求的承诺； d) 提供建立和评审环境目标和指标的框架； e) 形成文件，付诸实施，予以保持，并传达到全体员工； f) 可为公众所获取。4.3 规划（策划） 4.3.1 环境因素 组织应建立并保持一个或多个程序，用来确定其活动、产品或服务中它能够控制，或可望对其施加影响的环境因素，从中判定那些对环境具有重大影响，或可能具有重大影响的因素。组织应确保在建立环境目标时，对与这些重大影响有关的因素加以考虑。 组织应及时更新这方面的信息。4.3.2 法律与其他要求 组织应建立并保持程序，用来确定适用于其活动、产品或服务中环境因素的法律，以及其它应遵守的要求，并建立获取这些法律和要求的渠道。 4.3.3 目标和指标 组织应针对其内部每一有关职能和层次，建立并保持环境目标和指标。环境目标和指标应形成文件。 组织在建立与评审环境目标时，应考虑法律与其他要求，它自身的重要环境因素、可选技术方案、财务、运行和经营要求，以及各相关方的观点。 目标和指标应符合环境方针，并包括对预防污染的承诺。4.3.4 环境管理方案 组织应制定并保持一个或多个旨在实现环境目标和指标的环境管理方案，其中应包括： a) 规定组织的每一有关职能和层次实现环境目标和指标的职责, b) 实现目标和指标的方法和时间表。 如果一个项目涉及到新的开发和新的或修改的活动、产品或服务，就应对有关方案进行修订，以确保环境管理与该项目相适应。4.4 实施与运行 4.4.1 组织机构和职责 为便于环境管理工作的有效开展，应当对作用、职责和权限作出明确规定、形成文件，并予以传达。 管理者应为环境管理体系的实施与控制提供必要的资源，其中包括人力资源和专项技能、技术以及财力资源。 组织的最高管理者应指定专门的管理者代表，无论他（们）是否还负有其他方面的责任，应明确规定其作用、职责和权限，以便： a) 确保按照本标准的规定建立、实施与保持环境管理体系要求； b) 向最高管理者汇报环境管理体系的运行情况以供评审,并为环境管理体系的改进提供依据。4.4.2 培训、意识与能力 组织应确定培训的需求。应要求其工作可能对环境产生重大影响的所有人员都经过相应的培训。 应建立并保持一套程序，使处于每一有关职能与层次的人员都意识到： a) 符合环境方针与程序和符合环境管理体系要求的重要性； b) 他们工作活动中实际的或潜在的重大环境影响，以及个人工作的改进所带来的环境效益； c) 他们在执行环境方针与程序，实现环境管理体系要求，包括应急准备与响应要求方面的作用与职责； d) 偏离规定的运行程序的潜在后果。 从事可能产生重大环境影响的工作的人员应具备适当的教育、培训和（或）工作经验，从而胜任他所担负的工作。4.4.3 信息交流 组织应建立并保持一套程序，用于有关其环境因素和环境管理体系的 a) 组织内各层次和职能间的内部信息交流； b) 与外部相关方联络的接收、文件形成和答复。 组织应考虑对涉及重要环境因素的外部联络的处理，并记录其决定。4.4.4 环境管理体系文件 组织应以书面或电子形式建立并保持下列信息： a) 对管理体系核心要素及其相互作用的描述； b) 查询相关文件的途径。4.4.5 文件控制 组织应建立并保持一套程序，以控制本标准所要求的所有文件，从而确保： a) 文件便于查找； b) 对文件进行定期评审，必要时予以修订并由受权人员确认其适宜性； c) 凡对环境管理体系的有效运行具有关键作用的岗位，都可能得到有关文件的现行版本； d) 迅速将失效文件从所有发放和使用场所撤回，或采取其他措施防止误用； e) 对出于法律和（或）保留信息的需要而留存的失效文件予以标识。 所有文件均须字迹清楚，注明日期（包括修订日期），标识明确，妥善保管，并在规定期间内予以留存。应规定并保持有关建立和修改各种类型文件的程序与职责。4.4.6 运行控制 组织应根据其方针、目标和指标，确定与所标识的重要环境因素有关的运行与活动。应针对这些活动（包括维护工作）制定计划，确保它们在程序规定的条件下进行。程序的建立应符合下述要求： a) 对于缺乏程序指导可能导致偏离环境方针和目标与指标的运行，应建立并保持一套以文件支持的程序； b) 在程序中对运行标准予以规定； c) 对于组织所使用的产品和服务中可标识的重要环境因素，应建立并保持一套管理程序，并将有关的程序与要求通报供方和承包方。4.4.7 应急准备和响应 组织应建立并保持一套程序，以确定潜在的事故或紧急情况，做出响应，并预防或减少可能伴随的环境影响。 必要时，特别是在事故或紧急情况发生后，组织应对应急准备和响应的程序予以评审和修订。 可行时，组织还应定期试验上述程序。4.5 检查和纠正措施 4.5.1 监测和测量 组织应建立并保持一套以文件支持的程序，对可能具有重大环境影响的运行与活动的关键特性进行例行监侧和测量。其中应包括对环境表现、有关的运行控制、对组织环境目际和指标符合情况的跟踪信息进行记录。 监测设备应予校准并妥善维护，并根据组织的程序保存校准与维护记录。 组织应建立并保持一个以文件支持的程序，以定期评价对有关环境法律、法规的遵循情况。4.5.2 不符合，纠正与预防措施 组织应建立并保持一套程序，用来规定有关的职责和权限，对不符合进行处理与调查，采取措施减少由此产生的影响，采取纠正与预防措施并予完成。 任何旨在消除已存在和潜在不符合的原因的纠正或预防措施，应与该问题的严重性和伴随的环境影响相适应。 对于纠正与预防措施所引起对程序文件的任何更改，组织均应遵照实施并予以记录。4.5.3 记录 组织应建立并保持一套程序，用来标识、保存与处置有关环境管理的记录。这些记录中还应包括培训记录和审核与评审结果。 环境记录应字迹清楚，标识明确，具备对相关活动、产品或服务的可追溯性。对环境记录的保存和管理应使之便于查阅，避免损坏、变质或遗失。应规定其保存期限并予记录。 组织应保存记录，在对其体系及自身适宜时，用来证明符合本标准的要求。4.5.4 环境管理体系审核 组织应制定并保持用于定期开展环境管理体系审核的一个或多个方案和一些程序，进行审核的目的是： a) 判定环境管理体系： 1)是否符合对环境管理工作的预定安排和本标准的要求； 2)是否得到了正确的实施和保持。 b) 向管理者报送审核结果。 组织的审核方案（包括时间表）的制定，应立足于所涉及活动的环境重要性和以前审核的结果。为全面起见，审核程序中应包括审核的范围、频次和方法，以及实施审核和报告结果的职责与要求。4.6 管理评审 组织的最高管理者应按其规定的时间间隔，对环境管理体系进行评审，以确保体系的持续适用性、充分性和有效性。管理评审过程应确保收集必要的信息，以供管理者进行评价工作。评审工作应形成文件。 管理评审应根据环境管理体系审核的结果、不断变化的客观环境和持续改进的承诺，指出对方针、目标以及环境管理体系的其他要素加以修正的可能的需要。附录A（提示的附录）规范使用指南本附录对“要求”作了进一步说明，以防止对“规范”的错误解释。本附录仅涉及第4章中所述的关于“要求”的内容。 A1 总要求 实施“规范”所规定的环境管理体系的目的，是改进环境表现（行为）。“规范”立足于这样一个基本概念，即组织将定期评审与评价其环境管理体系，以寻求对它进行改进的可能性并予以实施。而对环境管理体系的改进，是为了实现环境表现（行为）的进一步改进。 环境管理体系为持续改进的实现提供了一个结构化的过程，改进的程度和范围由组织根据其经济状况和其他客观条件自行决定。尽管可以期望通过采用系统化的方法，实现环境表现（行为）上的某些改进，但应当认识到，环境管理体系毕竟只是一种工具，其作用是帮助组织去实现和系统地控制它自己设定的环境表现（行为）水准。环境管理体系的建立与运行，本身并不必然地导致立即降低有害环境影响的结果。 是在整个组织内，还是仅在一些特定的工作部门或活动中实施本标准，可由组织自行决定。如果仅在特定的工作部门或活动中实施，可以采纳组织内其他部分业已建立的方针和程序，用来满足本标准的要求，只要它们适用于行将采用本标准的这些特定部门或活动。环境管理体系的详尽与复杂程度，文件提供的程度，支持体系运行的资源，都取决于组织的规模及其所从事活动的性质，对于中小型企业尤其如此。 把环境事务纳入整个管理体系，将有助于环境管理体系的有效实施，同时有助于提高效能，明确责任。 本标准规定的管理体系要求，是建立在一个由“计划（策划）、实施、检查、评审”诸环节构成的动态循环过程的基础上。 该体系应使组织能够： a) 制定适宜的环境方针； b) 确定其过去、当前或计划的活动、产品或服务中的环境因素，以判定其中的重大环境影响； c) 确定有关的法律、法规要求； d) 确定优先事项，建立适当的环境目标和指标； e) 建立组织机构，制定方案，以实施环境方针，实现环境目标和指标； f) 顺利开展规划（策划）、控制、监测、纠正措施、审核与评审活动，以确保对环境方针的遵循和环境管理体系的持续适宜性。 g) 根据不断变化的客观条件作出修正。A2 环境方针 环境方针是实施与改进组织的环境管理体系的推动力，具有保持和潜在改进环境表现（行为）的作用。因此，环境方针须反映最高管理者对遵循有关法律和保证持续改进的承诺。环境方针是组织建立目标和指标的基础。对方针的规定应当作到意义明确，使内、外相关方都易于理解。应当对方针进行定期评审与修订，以反映不断变化的条件和信息。方针的应用范围应当是可以明确界定的。 组织的最高管理者应规定其环境方针并将其形成文件。如果它从属于一个更大的组织，其环境方针还应符合后者的方针，并得到后者的认可。 注：最高管理者可以是对组织负有执行职责的个人或集体。 A3 规划（策划） A3.1环境因素 4.3.1提供了一个过程，组织可据此确定哪些重要环境因素应作为其的环境管理体系的优先事项。该过程应考虑到分析工作的费用和时间，以及可靠数据的可得性。可以利用出于法规或其他目的所取得的现有信息。组织还可以把他们所关心的环境因素的实际控制程度也纳入考虑范围。组织应当考虑其现行的，以及与此有关的过去的活动、产品和（或）服务所伴随的投入和产出，以确定自身的环境因素。 如果一个组织尚未建立环境管理体系，首先应当通过评审的方式来确定自己的环境状况，这样做的目的，是对组织所具有的一切环境因素予以考虑，以此作为建立环境管理体系的基础。 已实施环境管理体系的组织，可以不进行这一评审。 评审范围应覆盖下列四个关键方面： a) 法律、法规要求； b) 重要环境因素的确定； c) 对所有现行环境管理活动与程序的审查； d) 对来自以往事件调查的反馈意见的评价。 在所有情况下，都应当考虑到组织内的正常和异常运行条件，以及可能发生的紧急状态。 评审的适宜作法可包括使用调查表、面谈、直接检验和测量，利用以往审核或其他评审的结果等，应视活动性质而定。 应对涉及下列因素的工作部门的活动所伴随的重要环境因素的确定予以考虑： a) 向大气的排放； b) 向水体的排放； c) 废物管理； d) 土地污染； e) 原材料与自然资源的使用； f) 其他当地环境问题和社区性问题。 这一过程中应考虑到正常运行条件，关闭与启动时的条件，以及可合理预见的情况或紧急状态所伴随的潜在的重大环境影响。 这一过程的目的在于确定与活动，产品或服务所伴随的重大环境影响，而不要求作具体的生命周期评价。组织无须对它的每一种产品、部件和原材料投入都作出评价。他们可以从活动、产品或服务中选择出某些属类，从中确定那些最可能具有重大环境影响的因素。 对产品环境因素的控制和影响，因组织所面临的市场情况不同而有很大的差异。相对说来，组织的承包方或供方的控制作用较微弱，而由于组织负责产品的设计，它能通过这一过程明显地改变环境因素，如通过更换某种输入材料。考虑到组织在他们产品的使用和处置过程中控制作用有限，在可行时，他们应考虑建立适当的贮运与处置机制。但这一规定不意味着改变或增加组织的法律责任。A3.2法律与其他要求 组织应遵守的其他要求示例： a) 行业规范； b) 与有关机构的协定； c) 非法规性指南。 A3.3 目标和指标 凡属可行，目标均应具体，指标均应可测量，必要时应将预防措施考虑在内。 对技术的选择，可根据自身的经济条件，考虑选用效益高、成本低。适于应用的最佳可行技术。 正文中提及对组织的财务要求，不意味着组织必须采取环境成本核算。A3.4 环境管理方案 制定与执行一个或多个方案是成功实施环境管理体系的一个关键要素。方案中应说明如何实现组织的环境目标和指标，包括时间进度和负责实施环境方针的人员。方案可予细化，具体到组织运行的基本要素。方案中应包括对新活动的环境评审。 在适当和可行时，无论对现行还是新增的活动、产品或服务，方案中可包括对计划设计、生产，营销和处置的考虑。对于产品，可从设计、材料、加工、使用及最终处置等方面进行考虑。对于安装工作或工艺上的重大修改，可从计划、设计、施工、试运行、运行，以及根据组织决定的适当时间予以关闭等方面考虑。A4 实施与运行 A4.1 组织结构和职责 环境管理体系的成功实施需要组织内全体员工的承诺。因此，不能认为环境上职责仅限于环境职能部门，事实上，组织内的其他部门，如运行管理部门，人事部门等，也可以有这方面责任。 这一承诺始于最高管理者，他（们）应制定组织的环境方针并确保环境管理体系的实施。作为上述承诺的一部分，是指定专门的管理者代表，规定他（们）对实施环境管理体系的职责和权限。对于大型或复杂的组织，可以有不止一个管理者代表。对于中、小型企业，可由一个人承担这些职责。最高管理者还应确保提供环境管理体系的实施与保持所需的适当的资源。另一重要事项是妥善规定环境管理体系的关键职责，并落实到有关人员。A4.2 培训、意识和能力 组织应建立并保持一套确定培训需求的程序。同时，它还应要求代表它工作的承包方证实其员工接受过必要的培训。 管理者应对确保人员胜任性（特别是行使环境管理职能的人员）所需的经验、能力和培训水平予以确定。A4.3 信息交流 组织应实施对有关信息和相关方要求的接受、归档与答复的程序。该程序可包括与相关方的对话和对他们所关注的问题的考虑。在某些情祝下，对相关方所关注事务的答复中，可包含有关组织运行所造成的环境影响的内容。这些程序中，还应包含就应急计划和其他问题与官方机构的联络事宜。A4.4 环境管理体系文件 文件内容应足够详尽，以充分描述环境管理体系的核心要素，以及它们之间的相互作用的情况。同时，还应能指示出获取关于环境管理体系中具体运行部分的更详细信息的途径。可将环境文件纳入组织实施的其他体系的文件。不强求编制专门手册。有关文件应包括: a) 过程信息； b) 组织机构图； c) 内部标准与运行程序； d) 现场应急计划。A4.5 文件控制 4.4.5旨在确保组织对文件的建立与保持能够充分适应实施环境管理体系的需要。但组织应将主要注意力放在环境管理体系的有效实施及其环境表现（行为）上，而不应过分追求一个繁琐的文件控制系统。A4.6 运行控制 将来修订时可能会增添这方面的内容。A4.7 应急准备和响应 将来修订时可能会增添这方面的内容。A5 检查与纠正措施 A5.1 监测和测量 将来修订时可能会增添这方面的内容。A5.2 不符合、纠正和预防措施 组织在制定与保持用于调查与纠正不符合的程序时，应包含下列基本内容： a) 确定引起不符合的原因； b) 确定并实行必要的纠正措施； c) 实施或修改必要的控制措施，以防再度发生不符合； d) 记录由纠正措施所导致的对书面程序的任何更改。 根据情况的不同，有时纠正措施可能只需略为计划，并能迅速见效，但有时可能是一项复杂、长期的活动。相应的文件应与纠正措施的规模相适配。A5.3 记录 用来标识、保持与处置记录的程序，应将重点放在那些为实施与运行环境管理体系所需的和关于环境目标和指标实现程度的记录上。 环境记录可包括： a) 关于适用的环境法律与其他要求的信息； b) 投诉记录； c) 培训记录； d) 过程信息； e) 产品信息； f) 检查、维护与校准记录； g) 有关的供方与承包方信息； h) 事故报告； i) 应急准备与响应信息； j) 重要环境因素信息； k) 审核结果 l)管理评审。 应对机密业务信息的管理给以适当考虑。A5.4 环境管理体系审核 审核方案与程序应包括： a) 待审核的活动与区域； b) 审核的频次； c) 管理与实施审核的职责； d) 审核结果的通报； e) 审核员的能力； f) 如何实施审核。 审核工作可由组织内部人员或组织聘请的外部人员承担，无论哪种情况，从事审核的人员都应做到公正，客观。A6 管理评审 为了保持环境管理体系的持续改进、适用性和有效性，从而取得良好的环境表现（行为）。组织的管理者应按规定的时间间隔对环境管理体系进行评审与评价。评审范围应当全面，但不必在一次评审中涉及环境管理体系的所有要素，同时评审过程可以延续一段时间。 对方针、目标与程序的评审，应由制定它们的相应管理层承担。 评审内容应包括： a) 审核结果； b) 目标和指标的实现程度； c) 面对变化的条件与信息，环境管理体系是否具有持续的适用性； d) 相关方关注的问题。 观察结果、结论与建议应形成文件，以便采取必要的措施。文献目录1. GB/T240041996，环境管理体系 原则、体系和支持技术通用指南 2. GB/T240101996，环境审核指南 通用原则 3. GB/T240111996，环境审核指南 审核程序 环境管理体系审核 4. GB/T240121996，环境审核指南 环境审核员资格要求ASME B1.3M ADOPTION NOTICE ASME B1.3M, Screw Thread Gaging Systems for Dimensional Acceptability - Inch and Metric Screw Threads (UN, UNR, UNJ, M, and MJ) wa8 adopted on 10 March 1994 for use by the Departmens of Defense (DoD). Proposed changes by DoD activities must be submitted to the DoD Adopting Activity: Defense Industrial Supply Center, ATTNt DISC-EPT, 700 Robbins Avenue, Philadelphia, PA 19111-5096. DoD activitiee may obtain copies of this standard from the Standardization Document Order Desk, 700 Robbins Avenue, Building 40, Philadelphia, PA 19111-5094. The private sector and other Government agencies may purchase copies from The American Society of Mechanical Engineers, United Engineering Center, 345 East 47nd Street, New York, NY 10017-2392 or The American National Standards Institute, 11 West 42nd Street, New York, NY 10036-8002. NOTE: Use of this standard is subject to a l l requirements and limitations of FED-STD-H28/20, Screw-Thread Standards for Federal Services, Section 20, Inspection Methods for Acceptability of UN, UNR, UNJ, M, and MJ Screw-Threads. Custodians: Army - AR Navy - AS Air Force - 99 Adopting Activity: DLA - IS Review Activities : , Army - AT, AV, ER, ME, MI Navy - EC, OS, YD Air Force - 82 AREA THDS DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. COPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesCOPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling Services Errata to ASME Bl.3M-1992 The Errata corrections listed below apply to ASME B1.3M-1992, Screw Thread Gaging Systems for Dimensional Acceptability. This Errata is being issued in the form of replacement pages. Corrections are incorporated directly into the affected pages. Replace or insert the pages listed. It is also advisable that this cover page be retained for reference. The pages show the corrections given below. The pages not listed are the reverse sides of the listed pages and contain no changes. Page Location Change 5 Table 1 In Column J, , for 4.3.2, delete bullet 6 Table 1 (1) In column D, , for 4.9, delete bullet (2) In column D, , for 4.9, add bullet 8, 9 Table 2 11 Table 2 12 Table 3 (1) In column B, , for 1.1, delete bullet (2) Entries for 3.2 through 3.5 deleted (3) Column M heading should read Diam. Runout Minor to Pitch (1) Column M heading should read Diam. Runout (2) In column M, for 9, add bullet (1) For System 21: Minor to Pitch (a) column JI , add 9 (b) column J, add 9 9, 10 (a) column C, , add 9 (b) column C, add 9 (c) column J, , add 9 (d) column J, add 9 (a) column C, , add 9 (b) column C, add 9 (c) column JI , add 9 (d) column J, add 9 (e) column EJ, change 4, 10 to read 4.10 (2) For System 21A, column L, change 9.10 to read (3) For System 22: (4) For System 23: THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS JULY 1994 345 East 47th Street, New York, N.Y. 10017 N9692E COPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesCOPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesThe Standard is downloaded from Standard SharingPage Location 13 Table 4 Change (1) For SyFtem 21, column K, , add 9 (2) For System 22: (a) column A, , delete 2.1 (b) column C, J add 9 (c) column C , , add 9 (d) column K2 J add 9 (a) column C, add 9 (b) column C , , add 9 (c) column K2, add 9 (d) column E,-I, change 4, 10 to read 4.10 (e) In second column, next to last entry should read Runout minor diameter to pitch diameter (3) For System 23: COPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesCOPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesSCREW THREAD GAGING SYSTEMS FOR DIMENSIONAL ACCEPTABILITY ASME B1.3M-1992 TABLE 1 SCREW THREAD GAGES AND MEASURING EQUIPMENT FOR EXTERNAL PRODUCT THREAD CHARACTERISTICS 4.1.1 Note (1 11 e 4.3.2 Note (1 11 e 4.3.1 Note (111 e 4.1.2 Note (1 11 e 4.5.1 e e e 4.52 e e NOTE: (1) Maximum minor diameter limit is acceptable when product passes GO gage on UN, UNR, UNJ, M, and MJ threads. 5 COPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesCOPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesThe Standard is downloaded from Standard SharingASME B1.3M-1992 SCREW THREAD GAGING SYSTEMS FOR DIMENSIONAL ACCEPTABILITY TABLE 1 SCREW THREAD GAGES AND MEASURING EQUIPMENT FOR EXTERNAL PRODUCT THREAD CHARACTERIS Thread Gages and Measuring Equipment 4.6.1 Minimum material -thread groove diameter type - cone or best wire size radius profile 120 deg. contact 4.6.2 Minimum material -thread groove diameter type - cone or best wire size radius profile I 180 deg. contact 4.7 Major diameter and pitch diameter runout gage Material NOT GO Functional Diameter U Func. Func. Limit Size :i- 4.8 Differential segments or rolls (GO profile for one pitch in length) used in combi- nation with GO/minimum material indicating gages to yield a diameter equivalent for variations in lead (including uniformity of helix) and flank angle 4.9 Minimum material - B and C NOT GO rolls or seg- ments II 4.10 Cumulative form gaging - maximum-material and minimum-material dimensions collectively estab- lish cumulative form within limits defined by the applicable thread documents 5 Indicating Plain Diameter Gages 5.1 Major diameter type 5.2 Minor diameter type 6 Pitch Micrometer With Standard Contacts (Approxi- mately NOT GO Profile) Cone and Vee 0 7 Pitch Micrometer With Modified Contacts (Approxi- mately Pitch Diameter Contact) Cone and Vee 8 Thread Measuring Wires With Suitable Measuring Means 9 Optical Comparator and Toolmakers Microscope With Suitable Fixturing 10 Profile Tracting Equipment With Suitable Fixturing 11 Lead Measuring Machine With Suitable Fixturing 12 Helical Path Attachment Used With GO Type Indicating Gage 13 Helical Path Analyzer 14 Plain Micrometer and Calipers - Modified as Reauired 15 Surface Measuring Equipment or Texture Comparison Soecimen II 16 Roundness Equipment IlII 17 Linear Measuring Machine With Required Accessories 18 Coordinate Measuring Machine With Required Accessories GENERAL NOTE: CS (CONTD) Minimum Material Boundary Flank Size - I D 4 The notation NOT GO is used to indicate LO, MN/MT, and NOT GO gages as described by the respective gage standard. 6 COPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesCOPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesSCREW THREAD GAGING SYSTEMS FOR DIMENSIONAL ACCEPTABILITY ASME B1.3M-1992 TABLE 1 SCREW THREAD GAGES AND MEASURING EQUIPMENT FOR EXTERNAL PRODUCT THREAD CHARACTERISTICS (CONTD) Roundness of 4.6.1 4.62 P I + 4.1 O linder Multilobe Cylinder 120 deg. of Pitch Diameter Angle Helix Taper Lead Flank Maior Minor Diam. Runout Oiameter Texture to Pitch Rad. Size Limit Size Limit Variation Variation Size Limit Size Limit Surface Major Root F 1 N M L Kz KI J, JI I H G2 GI F2 O O O 8 O O O O O O O 8 O Cumulative Form 7 COPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesCOPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesThe Standard is downloaded from Standard SharingASME B1.3M-1992 SCREW THREAD GAGING SYSTEMS FOR DIMENSIONAL ACCEPTABILITY TABLE 2 SCREW THREAD GAGES AND MEASURING EQUIPMENT FOR - INTERNAL PRODUCT THREAD CHARACTERISTICS Thread Gages and Measuring Equipment 1 Threaded Plug Gage (ANSI 847.1) 1.1 GO 1.2 NOT GO 1.3 Full form gage GO plug (MJ only) 1.4 B and C NOT GO 3 Plain Diameter Gages - 3.l(a) Minimum (GO) plain cylindrical plug for minor diameter (b) Maximum (NOT GO) plain cylindrical plug for minor diameter 4 Indicating Thread Gages Having either two contacts r 180 deg. or three contacts C 3 120 deg. 4.1.1 GO segments 120 deg. contact 4.1.2 GO segments Q 180 deg. contact 4.3.1 GO rolls 120 deg. contact 4.3.2 GO rolls 180 deg. contact 4.5.1 Minimum material - pitch diameter type - cone and vee J 120 deg. contact 4.5.2 Minimum material - pitch diameter type - cone and vee r 180 deg. contact 4.6.1 Minimum material - thread groove diameter type - cone or best wire size radius profile 120 deg. contact 4.6.2 Minimum material -thread groove diameter type - cone or best wire size radius profile Q 180 deg. contact 4.7 Minor diameter and pitch diameter runout gage 4.8 Differential segments or rolls (GO profile for one pitch in length) used in combi- nation with GO/minimum material indicating gages to yield a diameter equivalent for variations in lead (including uniformity of helix) and flank angle 4.9 Minimum material - B and C NOT GO rolls or seg- ments GENERAL NOTE: Maximum Material Minimum Material I I . . _ The notation NOT GO is used to indicate LO, MN/MT, and NOT GO gages as described by the respective gage Standard. 8 COPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesCOPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesNOTE: (1) Minimum major diameter limit is acceptable when product passes GO gage. 9 COPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesCOPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesThe Standard is downloaded from Standard SharingASME 81.3M-1992 SCREW THREAD GAGING SYSTEMS FOR DIMENSIONAL ACCEPTABILITY TABLE 2 SCREW THREAD GAGES AND MEASURING EQUIPMENT FOR INTERNAL PRODUCT THREAD CHARACTERISTICS ICONTD) I Thread Gages and Measuring Equipment 4.10 Cumulative form gaging - maximum-material and minimum-material dimensions collectively estab- lish cumulative form within limits defined by the applicable thread documents 5 Indicating Plain Diameter Gages 5.1 Maior diameter tvDe 5.2 Minor diameter type 6 Pitch Micrometer With Standard Contacts (Approxi- 7 Pitch Micrometer With Modified Contacts (Approxi- mately NOT GO Profile) Cone and Vee mately Pitch Diameter Contact) Cone and Vee 8 Thread Measuring Balls With Suitable Measuring Means 9 Optical Comparator and Toolmakers Microscope With Suitable Fixturing and Cast Replica 10 Profile Tracing Equipment With Suitable Fixturing 14 Surface Measuring Equipment or Texture Comparison Specimen 15 Roundness Equipment 16 Linear Measuring Machine With Required Accessories 17 Coordinate Measuring Machine With Required Acces- GENERAL NOTE: sories 1 NOT GO 1 Functional Thd. Groove Thread Minimum Material The notation NOT GO is used to indicate HJ, MN/MT, and NOT GO gages as described by the respective gage Standard. 10 COPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesCOPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesSCREW THREAD GAGING SYSTEMS FOR DIMENSIONAL ACCEPTABILITY 4.1 O ASME B1.3M-1992 TABLE 2 SCREW THREAD GAGES AND MEASURING EQUIPMENT FOR INTERNAL PRODUCT THREAD CHARACTERISTICS (CONTDI Cumulative Form Roundness of Pitch Cylinder Taper Lead Incl, Flank Angle Oval Multilobe of Pitch Major Minor Diam. Runout 180 deg. 120 deg. Cylinder. Diameter Diameter Root Minor Surface Limit Size Limit Size Limit Size Variation Variation Limit Size Limit Size Rad. to Pitch Texture EEFFGG H I J JKKL M N 11 COPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesCOPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesThe Standard is downloaded from Standard SharingASME B1.3M-1992 System 21 21A (For M Threads per ANSI B1.18M) 22 23 SCREW THREAD GAGING SYSTEMS FOR DIMENSIONAL ACCEPTABILITY TABLE 3 GAGING SYSTEMS FOR EXTERNAL THREADS Dimensions Inspected (For dimensiodgage combinations to be used, refer ta Table 1.) GO maximum material NOT GO functional diameter Major diameter GO maximum-material boundary Minimum-material boundary B and C NOT GO Root profile Major diameter GO maximum material Minimum material Pitch diameter or Thread groove diameter NOT GO functional diameter combined with control of Lead (including helix) and Flank angle (over the length of full thread) Major diameter Minor diameter (rounded root) Root profile GO maximum material Minimum material Pitch diameter or Thread groove diameter Major diameter Minor diameter Root profile Roundness of pitch cylinder: Oval 180 deg. Multilobe 120 deg. Taper of pitch cylinder Cumulative form variation Lead including helix variation Flank angle variation Runout major diameter to pitch diameter Surface texture l- Applicable Thread Gages and Measuring Eauipment AttributedFixed Limit Control 1.1, 2.1, 2.3, 4.1, 4.3 1.2, 2.2, 2.4, 4.1, 4.3. 6 3.l(a), 3.l(b), 3.2, 3.4, 5.1, 9, 14 1.1, 2.1, 2.3, 4.1, 4.3 2.7, 4.9 . 3.l(a), 3.l(b), 3.2, 3.4, 5.1. 14 1.1, 2.1, 2.3, 4.1, 4.3 2.5, 4.5, 7, 9 2.6, 4.6, 8 1.2, 2.2, 2.4, 4.1, 4.3. 6 . . Ll(a), 3.2, 3.4, 5.1, 9, I d 3.3, 3.5, 5.2, 9 . 1.1, 2.1, 2.3, 4.1, 4.3 2.5, 4.5, 7, 9 2.6, 4.6, 8 Ll(a), 3.2, 3.4, 5.1, 9, 1 d 3.3, 3.5, 5.2, 9 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 4.1, 4.3, 4.5, 4.6, 4.8, 6, 7, 8, 9, 16 4.1, 4.3, 4.5, 4.6, 4.8, 9, 16 2.2, 2.4, 2.5, 2.6, 4.5, 4.6, 4.8, 6, 7, 8 . . I I Variables/lndicating Control 4.1, 4.3 4.1, 4.3, 6 5.1, 9, 14, 17, 18 4.1, 4.3 4.9 9, 10, 18 5.1, 14, 17, 18 4.1, 4.3 4.5, 7, 9, 17, 18 4.6, 8, 18 4.1, 4.3. 6 4.8, 9, 11, 12, 13, 17, 18 4.8, 9, 1 O, 18 5.1, 9, 14, 17, 18 5.2, 9, 17, 18 9, 10, 18 4. l. 4.3 4.5, 7, 9, 17, 18 4.6, 8, 18 5.1, 9, 14, 17, 18 5.2, 9, 17, 18 9, 10, 18 4.1, 4.3, 4.5, 4.6, 4.8, 6, 7, 8, 9, 16, 17, 18 4.1, 4.3, 4.5, 4.6, 4.8, 9, 16,18 4.5, 4.6, 4.8, 6, 7, 8, 17, 18 4.10 4.8, 9, 11, 12, 13, 17, 18 4.8, 9, 1 O, 18 4.7, 9, 18 15 NOTE: (1) Only by agreement between purchaser and supplier on limits and/or methods. COPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesCOPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesSCREW THREAD GAGING SYSTEMS FOR DIMENSIONAL ACCEPTABILITY System 21 21A (For M Threads per ANSI B1.18M) 22 23 TABLE 4 GAGING SYSTEMS FOR INTERNAL THREADS Dimensions Inspected (For dimensionlgage combinations to be used, refer to Table 2.) GO maximum material NOT GO functional diameter Minor diameter GO maximum-material boundan/ Minimum-material boundary B and C NOT GO Minor diameter GO maximum material Minimum material Pitch diameter or Thread groove diameter Orl I NOT GO functional diameter combined with control of: Lead (including helix) and Flank angle (over the length of full thread) Minor diameter GO maximum material Minimum material Pitch diameter Thread groove diameter or Minor diameter Roundness of pitch cylinder: Oval 180 deg. Multilobe 120 deg. Taper of pitch cylinder Cumulative form variation Lead including helix variation Flank angle variation Runout minor diameter to pitch diameter Surface texture T ASME B1.3M-1992 Applicable Thread Gages and Measuring Equipment Attributes/Fixed Limit Control 1.1, 1.3, 4.1, 4.3 1.2, 4.1, 4.3, 6 1.3, 3.l(a), 3.l(b), 3.3, 3.5, 5.2 1.1, 1.3, 4.1, 4.3 1.4, 4.9 1.3, 3.l(a), 3.1(b), 3.3, 3.5. 5.2 _ 1.1, 1.3, 4.1, 4.3 4.5, 7, 9 4.6, 8 1.2, 4.1, 4.3, 6 . 1.3. 3.l(a), 3.3, 3.5. 5.2 1.1, 1.3, 4.1, 4.3 4.5, 7, 9 4.6. 8 1.3, 3.l(a), 3.3, 3.5, 5.2 4.1, 4.3, 4.5, 4.6, 4.8, 6, 7, 8, 15 4.1, , 4.6, 4.8, 15 4.5, 4.6, 4.8, 6, 7. 8 . . . . NOTE: (1) Only by agreement on limits and/or methods between purchaser and supplier. - . . Variables/lndicating Control 4.1, 4.3 4.1, 4.3, 6 5.2, 9, 16, 17 4.1, 4.3 4.9 5.2, 16, 17 4.1, 4.3 4.5, 7, 9, 16, 17 4.6, 8, 16, 17 4.1, 4.3, 6 4.8, 9, 17 4.8, 9, 1 O, 17 5.2, 9, 16, 17 4.1, 4.3 4.5, 7, 9, 16, 17 4.6, 8, 16, 17 5.2, 9, 16, 17 4.1, 4.3, 4.5. 4.6, 4.8, 6, 7, 8, 15, 16, 17 .4.8. 15. 17 4.5, 4.6, 4.8, 6, 7, 8, 16, 17 4.10 4.8, 9, 17 4.8, 9, 10, 17 4.7, 9, 17 14 13 COPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesCOPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesThe Standard is downloaded from Standard SharingCOPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesCOPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesASME B1.3M 92 m 0759b70 0534469 LOO m AN AMERICAN NATIONAL STANDARD Screw Thread Gaging Systems for Dimensional Acceptability - Inch and Metric Screw Threads (UN, UNR, UNJ, M, and MJ) The American Society of Mechanical Engineers 345 East 47th Street, New York, N.Y. 1 O01 7 ASME BI ,3M-1992 (REVISION OF ANSVASME B1.3M-1986) The American Society of Mechanical Engineers 345 East 47th Street, New York, N.Y. 1 O01 7 COPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesCOPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesThe Standard is downloaded from Standard SharingASME B1-3M 92 W 0759b70 0534470 922 W Date of Issuance: June 30, 1993 This Standard will be revised when the Society approves the issuance of a new edition. There will be no addenda or written interpretations of the re- quirements of this Standard issued to this edition. ASME is the registered trademark of the American Society of Mechanical Engineers. This code or standard was developed under procedures accredited as meeting the criteria for American National Standards. The Consensus committee that approved the code or standard was balanced to assure that individuals from competent and concerned interests have had an oppor- tunity to participate. The proposed code or standard was made available for public review and comment which provides an opportunity for additional public input from industry, academia, regulatory agencies, and the public-at-large. ASME does not approve, rate, or endorse any item, construction, proprietary device, or activity. ASME does not take any position with respect to the validity of any patent rights asserted in connection with any items mentioned in this document, and does not undertake to insure anyone utilizing a standard against liability for infringement of any applicable Letters Patent, nor assume any such liability. Users of a code or standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, is entirely their own responsibility. Participation by federal agency representativeb) or person(s) affiliated with industry is not to be interpreted as government or industry endorsement of this code or standard. ASME accepts responsibility for only those interpretations issued in accordance with governing ASME procedures and policies which preclude the issuance of interpretations by individual vol- unteers. No part of this document may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher. Copyright O 1993 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All Rights Reserved Printed in U.S.A. COPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesCOPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesASME B1.3M 92 0759b70 05344711 ab9 m FOREWORD (This Foreword is not part of ASME B1.3M-1992.) The 1986 edition of this. Standard was a combination of ANSI B1.3-1979 and ANSI B 1.3 198 l. These earlier versions of this Standard were based upon the following in- structions as defined by the B1 Committee at its meeting on October 7, 1976, which charged the B1.3 Subcommittee with the responsibility of preparing these documents. The Subcommittee was to prepare a catalog of gages and gaging systems so that each gage or gaging system would be defined only in terms of the dimension) controlled and so that any material of an editorial nature that could be construed as giving preference to one gage or gaging system over another would be eliminated, as outlined in the following three statements: (a) All references to referee gaging methods are to be eliminated from all B1 documents. (b) A catalog of gaging systems is to be prepared by the B1.3 Subcommittee so that any description of the gage relates only to the specific dimension) it controls. All material of an editorial nature that could be construed as giving preference will be eliminated. (c) The level of dimensional acceptability shall be determined by the threaded product application and specified by American National Standards or other product standards, or by procurement drawings or documents. Subsequently, the Subcommittee decided to combine these previous standards into one document and designate it ANSUASME B1.3M-1985, Screw Thread Gaging Systems for Dimensional Acceptability - Inch and Metric Screw Threads (UN, UNR, UNJ, M, and MJ). This revision includes the following specific changes: elimination of internal snap gages addition of best wire size radius contacts to minimum material thread groove meas- urement gaging clarification of out-of-round indicating gaging in Tables 1 and 2 addition of a reference to ANSVASME B46.1, Surface Texture, to provide roughness average guidelines to be used for the evaluation of the surface texture of threaded products addition of linear and coordinate measuring machines to the equipment included for thread evaluation clarification that all System 23 checks are not all mandatory clarification relating to the measurement of changes in diameter size because of out- of-roundness conditions Suggestions for improvement of this Standard will be welcome. They should be sent to Secretary, ASME BI Main Committee, 345 East 47th Street, New York, NY 10017. This revision was approved as an American National Standard on October 12, 1992. iii COPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesCOPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesThe Standard is downloaded from Standard SharingASME BL.3M 92 m 0759b70 0534472 7T5 m ASME STANDARDS COMMllTEE B1 Standardization and Unification of Screw Threads (The following is the roster of the Committee at the time of approval of this Standard.) OFFICERS E . Schwartz. Chairman K. E. McCullough, Vice Chairman C. J. Gome& Secretary COMMITTEE PERSONNEL J. R. Anderson R. J. Browning R. M. Byrne D. P. Cadieux F. G. Calderone F. H. Cantrell R. S. Charnerda R. Dodge P. H. Drake A. E. Ellis H. W. Ellison C. G. Erickson W. C. Farrell, Jr. R. E. Ferry, Jr. G. A. Flannery D. S. George J. Greenslade J. O. Heinze R. R. Hyman C. W. Jatho S. P. Johnson S. I. Kanter SUBCOMMllTEE BI . 3 - ACCEPTABILITY K. E. McCullough, Chairman C . J. Gomez, Secretary J. M. Allarn J. R. Anderson D. P. Cadieux F. G. Calderone F. H. Cantrell R. S. Chamerda H. W. Ellison D. S. George G. G. Gerber J. Greenslade J. Krippes R. W. Larnport R. S. LaNier J. B. Levy J. C. McMurray D. Miskinis W. R. Newman A. Painter G. A. Russ R. J. Sabatos D. M. Satava M. M. Schuster R. H. Searr R. E. Seppey A. D. Shepherd, Jr. V. B. Shook A. G. Strang J. F. Sullivan R. L. Tennis A. F. Thibodeau A. M. Wilkerson C. J. Wilson G. A. Jannison S. I. Kanter J. C. McMurray D. Miskinis A. Painter L. Pieninck D. M. Satava E. Schwartz R. H. Searr R. E. Seppey C. J. Wilson V COPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesCOPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesASME BL*3M 92 m 0757670 0534473 631 m CONTENTS . Foreword 111 Standards Committee Roster v 1 General 2 Reference Documents 3 Screw Thread Gages and Measuring Equipment 4 Gaging Systems 5 Gaging Requirements 6 Acceptability 7 Designation Tables 1 Screw Thread Gages and Measuring Equipment for External Product 2 . Screw Thread Gages and Measuring Equipment for Internal Thread Characteristics Product Thread Characteristics 3 Gaging Systems for External Threads 4 Gaging Systems for Internal Threads 1 1 1 2 2 2 3 4 8 12 13 vii COPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesCOPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesThe Standard is downloaded from Standard SharingASME B 1 - 3 M 92 0759670 0534474 578 m ASME B1.3M-1992 SCREW THREAD GAGING SYSTEMS FOR DIMENSIONAL ACCEPTABILITY - INCH AND METRIC SCREW THREADS (UN, UNR, UNJ, M, AND MJ) 1 GENERAL ANSI B1.18 M (a) This Standard presents screw thread gaging systems suitable for determining the acceptability of UN, UNR, UNJ, M, and MJ screw threads on ex- ternally and internally threaded products. It estab- lishes the criteria for screw thread acceptance when a gaging system is used. (b) A screw thread gaging system comprises a list of screw thread characteristics that must be inspected to establish the dimensional acceptability of the screw threads on a threaded product and the gage(s) which shall be used when inspecting those characteristics. (c) Federal Government Use. When this Standard is approved by the Department of Defense and federal agencies and is incorporated into FED-STD-H28/20, Screw Thread Standards for Federal Services, Section 20, the use of this Standard by the federal government is subject to all the requirements and limitations of a FED-STD-H28/20. 2 REFERENCE DOCUMENTS The latest issues of the following documents form a part of this Standard to the extent specified herein. American National Standards ANSI B1.l Form) Unified Inch Screw Threads (UN and UNR Thread - ANSVASME B 1.2 Gages and Gaging for Unified Inch Screw Threads ANSI B1.7M Nomenclature, Definitions, and Letter Symbols for Screw Threads ANSVASME B1.13M Metric Screw Threads - M Profile ASME B1.15 (under preparation) Unified Inch Screw Thread (UNJ Thread Form) a ANWASME B1.16M Gages and Gaging for Metric M Screw Threads Metric Screw Threads for Commercial Mechanical Fasteners - Boundary Profile Defined ANSVASME BI. 19M Gages for Metric Screw Threads for Commercial Me- chanical Fasteners - Boundary Profile Defined ANSI B1.21M Metric Screw Threads - MJ Profile ANSUASME B 1.22M Gages and Gaging for Metric MJ Screw Threads ANWASME B46.1 Surface Texture 3 SCREW THREAD GAGES AND MEASURING EQUIPMENT (a) Tables 1 and 2 for external and internal screw threads, respectively, are listings of screw thread gages, gaging elements, and measuring equipment. NOTE: Throughout the remainder of this Standard, the termgag& includes any gages, gaging elements, and measuring equipment listed in Tables 1 and 2. For each gage, these tables specify the thread char- acteristic) for which that gage has the capability of determining dimensional conformance. (b) The tables are arranged to establish product screw thread dimensional acceptance criteria based on recognized gaging concepts used to assess dimen- sional conformance. ( I ) Attributedfxed limit control is a quaiitative assessment of a characteristic(s) using gages which determine only if the characteristic(s) is in conform- ance. (2) Variabledindicating control is a quantita- tive and qualitative assessment on a characteristic(s) which is then compared with limiting values in order to determine if the characteristic(s) is in conformance. 1 COPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesCOPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesASIE BL.31 92 m 0759b70 0534475 404 ASME B1.3M-1992 4 GAGING SYSTEMS (a) Tables 3 and 4 present screw thread gaging systems for inspection of screw threads for externally threaded and internally threaded products, respec- tively. (b) The difference between gaging systems is the level of inspection deemed necessary to satisfy that dimensional conformance has been achieved. The fol- lowing gaging systems describe four accountable lev- els of dimensional inspection. ( 1 ) System 21. Provides for interchangeable as- sembly with functional size control at the maximum material limits within the length of standard gaging elements, and also control of the characteristics iden- tified as NOT GO functional diameters. (2) System 21A (for Metric Threads in Ac- cordance With ANSI B1.18M). Provides for inter- changeable assembly with functional size control at the maximum-material limits within the length of standard gaging elements. For external threads, con- trol of the minimum-material boundary is provided at two thread flank locations over the length of the full thread. For internal threads, control of the min- imum-material boundary is provided at two thread flank locations. Other thread characteristics such as lead, flank angle, taper, and roundness variations are confined within these limits with no specific control of their magnitudes. System 21A is not applicable to thread sizes smaller than M5. (3) System 22. Provides for interchangeable as- sembly with functional size control at the maximum- material limits within the length of standard gaging elements, and also control of the minimum-material size limits over the length of the full thread. The cumulative form variation of thread characteristics such as lead, flank angle, taper, and roundness is confined within the maximum- and minimum-mate- rial limits. ( 4 ) System 23. Provides for interchangeable as- sembly with functional size control at the maximum- material limits within the length of standard gaging elements, and also control of the minimum-material size limits over the length of the full thread. The magnitude of other thread characteristics such as lead, flank angle, taper, and roundness are further con- trolled within the maximum- and minimum-material limits. Only thread characteristics in System 23 for which requirements or limitations are specified must be evaluated for System 23 compliance. For example, if the product thread has no surface texture require- ment nor major to pitch runout limitation, then Sys- SCREW THREAD GAGING SYSTEMS FOR DIMENSIONAL ACCEPTABILITY tem 23 does not require that these two characteristics be checked. (c) For special applications, the screw thread on a threaded product may require inspection not con- sistent with any of the standard gaging systems. In such cases, one of the standard gaging systems should be selected and modified by specifying, in accordance with para. 7(b), the addition or the reduction of thread characteristic(s) and gage(s) as selected from Table 1 or 2, as applicable. (d) Diameter sizes are affected by roundness var- iations, which may be even-lobed (180 deg. contact) or odd-lobed (120 deg. contact). Consequently, prod- uct thread acceptance or rejection can be influenced by thread gages and measuring equipment having the ability to detect one, but not the other, because of gage construction and design. Tables 1 and 2 provide a selection of gages which in combination may be needed to assure that diameter size variations caused by out-of-roundness are contained within product tol- erance limits. 5 GAGING REQUIREMENTS (a) Screw threads of threaded products are de- fined by the applicable thread document. Appropriate ANSI Standards are included in Section 2. (b) The gaging system used to inspect the screw thread of a threaded product shall be as specified in the product standard, procurement drawing, or pur- chase inquiry and order. (c) Each of the thread characteristics specified in the gaging system shall be inspected using the gage (or one of the gages) specified for that characteristic. Gages shall be in conformance with the applicable gaging documents. Use appropriate standards listed in Section 2 unless otherwise specified. (d) The use of any gage or measuring device is not precluded if the results given by such gage or meas- uring device correlate with a gage or measuring device listed in this Standard. 6 ACCEPTABILITY (a) The screw thread of a threaded product shall be acceptable when each of the thread characteristics specified in the designated gaging system is found acceptable. (b) Within each gaging system, a choice of gages is specified for each characteristic. Acceptance by any 2 COPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesCOPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesThe Standard is downloaded from Standard SharingSCREW THREAD GAGING SYSTEMS FOR DIMENSIONAL ACCEPTABILITY one gage specified for a characteristic shall be the criterion for acceptance of that characteristic. (c) All threaded products are subject to visual in- spection for gross defects. This visual inspection shall be made without magnification and is intended to detect such gross defects as missing or incomplete threads, defective thread profile, torn or ruptured surfaces and cracks, etc. Surface texture of threaded products, when required, will be evaluated by visual or tactile comparison with texture specimens or sur- face measurement equipment. ANSVASME B46.1, Fig. B1 provides roughness average (R,) guidelines for various thread manufacturing processes. (d) Relationship of Gaging Systems to Product Screw Thread Acceptability ( I ) Product screw threads acceptable to System 23 are acceptable where Systems 22 and 21 are spec- ified. The reverse is not necessarily true. (2) Product screw threads acceptable to System 22 are acceptable where System 21 is specified. The reverse is not necessarily true. 7 DESIGNATION (a) Thread acceptability requirements as de- scribed in this Standard must be specified in addition to thread size designation and thread class specified in accordance with the applicable screw thread doc- ument. ( I ) Thread acceptability requirements may be specified by a general note on the drawing or pro- curement document stating a particular system and referencing ASME B1.3M. EXAMPLES: Note l. Acceptability of screw threads shown on this drawing shall be determined based on System 21, ASME B1.3M. Note l. Acceptability of screw threads shown on this drawing shall be determined based on System 22, ASME B1.3M. Note l. Acceptability of screw threads shown on this drawing shall be determined based on System 23, ASME B1.3M. (2) Thread acceptability requirements may be or or ASME B1.3M-1992 specified by showing a system number in parentheses following the thread tolerance class designation. EXAMPLES: 1/4-20UNC-2A(21) or M6x1-6g(21A) .250-2XUNJF-3A(22) or M6x1-68(23) or (b) In cases where gaging systems not tabulated in Table 3 or 4 are required, they shall be specified by designating the nearest tabulated gaging system number followed by an “S.” The modifications to the designated tabulated gaging system should im- mediately follow. EXAMPLES: Note l. Acceptability of screw threads shown on this drawing shall be determined based on System 21S, ASME B1.3M, with the addition of control of the thread root radius. or M6x 1 -6g(2 1 S) Root Radius Control Required or Note l. Acceptability of screw threads shown on this drawing shall be determined based on System 22S, ASME B1.3M, with the addition of control of the thread root radius. or 1 /4-20UNRC-2A(22S) Root Radius Control Required 1 /4-20UNC-2A(22S) Size Measurement Values Required or or M61-6g(23S) Functional Limit per Gage l. 1 Solid Ring Required or M61-6g(23S) Surface Texture Control Not Required 3 COPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesCOPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesASME B1.3M-1992 SCREW THREAD GAGING SYSTEMS FOR DIMENSIONAL ACCEPTABILITY TABLE 1 SCREW THREAD GAGES AND MEASURING EQUIPMENT FOR EXTERNAL PRODUCT THREAD CHARACTERISTICS t NOT GO Functional Diameter Func. Size - B , Thread Gages and Measuring Equipment Limit - 5 1 Threaded Ring Gages, Split or Solid (ANSI 647.1) 2.1 GO seaments 2.2 NOT GO segments 2.3 GO rolls o 2.4 NOT GO rolls II 2 . 5 Minimum material - pitch diameter type - cone and vee Il 2 . 6 Minimum material - thread groove diameter type - cone onlv Il 2 . 7 Minimum material - B and C NOT GO rolls or segments II t 3 Plain Diameter Gages 3 . 1 (a) Maximum (GO) plain cylindrical ring for major (b) Minimum (NOT GO) plain cylindrical ring for major diameter 3 . 2 Maior diameter snaD hwe II 3.3 Minor diameter snap type 3.4 Maximum and minimum major diameter snap type 3.5 Maximum and minimum minor diameter snaD tvDe I I 4 Indicating Thread Gages Having either two contacts at 180 deg. or three contacts at 120 deg. 4 . 1 . 1 GO segments 62 120 den. contact o m o m 4.1.2 GO seaments 180 dea. contact 1.1. o o m - m 4.3.1 GO rolls J 120 deg. contact o m 4.3.2 GO rolls 180 deg. contact o o 4.5.1 Minimum material - pitch diameter type - cone 4 . 5 . 2 Minimum material - pitch diameter type - cone and vee 120 deg. contact and vee Q 180 deg. contact GENERAL NOTE: The notation NOT GO is used to indicate LO, MN/MT, and NOT GO gages as described by the respective gage standard. 4 COPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesCOPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesThe Standard is downloaded from Standard SharingSCREW THREAD GAGING SYSTEMS FOR DIMENSIONAL ACCEPTABILITY I Roundness of I I I I ASME B1.3M-1992 TABLE 1 SCREW THREAD GAGES AND MEASURING EQUIPMENT FOR EXTERNAL PRODUCT THREAD CHARACTERISTICS Diam. Runout Minor Texture N (1) Maximum minor diameter limit is acceptable when product passes GO gage on UN, UNR, UNJ, M, and MJ threads. 5 COPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesCOPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesASME BL-3M 92 m 0759b70 0534479 05T m SCREW THREAD GAGING SYSTEMS FOR DIMENSIONAL ACCEPTABILITY ASME B1.3M-1992 TABLE 1 SCREW THREAD GAGES AND MEASURING EQUIPMENT FOR EXTERNAL PRODUCT THREAD CHARACTERISTICS (CONTDI T I Minimum Material S Maximum Material NOT GO Functional Diameter Boundary Thread Flank Thd. Groove Diam. 1 GO Pitch Diam. - Func Size m Limit Size Limit - Func. Limit Thread Gages and Measurina Eauinment Al 4.6.1 Minimum material -thread groove diameter type - cone or best wire size radius profile Q 120 deg. contact 4.6.2 Minimum material -thread groove diameter type - cone or best wire size radius profile Q 180 deg. contact 4.7 Maior diameter and pitch diameter runout gage 4.8 Differential segments or rolls (GO profile for one pitch in length) used in combi- nation with GO/minimum material indicating gages to yield a diameter equivalent for variations in lead (including uniformity of helix) and flank angle 4.9 Minimum material - B and C NOT GO rolls ur seg- ments 4.1 O Cumulative form gaging - maximum-material and minimum-material dimensions collectively estab- lish cumulative form within limits defined by the aDDliCable thread documents 5 Indicating Plain Diameter Gages 5.1 Major diameter type 5.2 Minor diameter type 6 Pitch Micrometer With Standard Contacts (Approxi- matelv NOT GO Profile) Cone and Vee a e e e 7 Pitch Micrometer With Modified Contacts (Approxi- mately Pitch Diameter Contact) Cone and Vee 8 Thread Measurina Wires With Suitable Measuring Means 9 Optical Comparator and Toolmakers Microscope With Suitable Fixturing 10 Profile Tracting Equipment With Suitable Fixturing 11 Lead Measurina Machine With Suitable Fixturing 12 Helical Path Attachment Used With GO Type Indicating Gaan 13 Helical Path Analyzer 14 Plain Micrometer and Calbers - Modified as Reauired 15 Surface Measuring Equipment or Texture Comparison Specimen 16 Roundness Equipment 17 Linear Measuring Machine With Required Accessories 18 Coordinate Measuring Machine With Required Accessories GENERAL NOTE: The notation NOT GO is used to indicate LO, M,/MT, and NOT GO gages as described by the respective gage standard. 6 COPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesCOPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesThe Standard is downloaded from Standard SharingSCREW THREAD GAGING SYSTEMS FOR DIMENSIONAL ACCEPTABILITY ASME B1.3M-1992 TABLE 1 SCREW THREAD GAGES AND MEASURING EQUIPMENT FOR EXTERNAL PRODUCT THREAD CHARACTERISTICS ICONTD) Roundness of Pitch I !linder Multilobe 120 deg. I Diam. Runout Major to Pitch Oval 180 deg. of Pitch Flank Limil Limit F1 - b Size F2 - rexture M N 4.6.1 m - m m I I 1 4.6.2 b b 4.7 4.8 1 m b b 4.9 Cumulative Form 4.1 O 5.1 5.2 7 S b b b b b b 10 11 12 13 14 I 15 -r 16 17 18 m NOTE: (1) Maximum minor diameter limit is acceptable when product passes GO gage on UN, UNR, UNJ, M, and MJ threads. 7 COPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesCOPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesASME BL-3M 92 H 0759b70 0534481 708 m SCREW THREAD GAGING SYSTEMS FOR DIMENSIONAL ACCEPTABILITY ASME B1.3M-1992 TABLE 2 SCREW THREAD GAGES AND MEASURING EQUIPMENT FOR HARACTERISTICS INTERNAL PRODUCT THREAD C T limum Material Maximum Material Boundary Thread NOT GO Functional Diameter Thd. Groove Diam. ) Func. size - Pitch Diam. t Func. Limit - - Size Thread Gages and Measurina Eauioment 1 Threaded Plug Gage (ANSI B47.1) 1.1 GO 1.2 NOT GO o 1.3 Full form gage GO plug (MJ only) 1.4 B and C NOT GO 3 Plain Diameter Gages 3.l(a) Minimum (GO) plain cylindrical plug for minor diameter t (b) Maximum (NOT GO) plain cylindrical plug for mino1 diameter 3.2 Maior diameter snaD tYDe * 3.3 Minor diameter snap type 3.4 Maximum and minimum major diameter snap type + 3.5 Maximum and minimum minor diameter snap type t I 4 Indicating Thread Gages Having either two contacts Q 180 deg. or three contacts Q 120 deg. 4.1.1 GO senments 120 den. contact b 4.1.2 GO seaments 180 dea. contact 4.3.1 GO rolls 120 deg. contact 4.3.2 GO rolls 180 deg. contact b 4.5.1 Minimum material - pitch diameter type - cone and vee 120 deg. contact and vee 180 den. contact 4.5.2 Minimum material - pitch diameter type - cone 4.6.1 Minimum material -thread groove diameter type - cone or best wire size radius profile 120 deg. contact 4.6.2 Minimum material -thread groove diameter type - cone or best wire size radius profile 180 deg. contact 4.7 Minor diameter and pitch diameter runout gage 4.8 Differential segments or rolls (GO profile for one pitch in length) used in combi- nation with GO/minimum material indicating gages to yield a diameter equivalent for variations in lead (including uniformity of helix) and flank angle 4.9 Minimum material - B and C NOT GO rolls or seg- ments b o GENERAL NOTE: The notation NOT GO is used to indicate LO, MN/MT, and NOT GO gages as described by the respective gage Standard. 8 COPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesCOPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesThe Standard is downloaded from Standard SharingASME BL-3M 92 m 0757670 0534482 644 M SCREW THREAD GAGING SYSTEMS FOR DIMENSIONAL ACCEPTABILITY ASME B1.3M-1992 Surface Texture N NOTE: (1) Minimum major diameter limit is acceptable when product passes GO gage. 9 COPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesCOPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesASME BL.3M 72 m 0757670 0534483 580 m ASME B1.3M-1992 SCREW THREAD GAGING SYSTEMS FOR DIMENSIONAL ACCEPTABILITY TABLE 2 SCREW THREAD GAGES AND MEASURING EQUIPMENT FOR INTERNAL PRODUCT THREAD CHARACTERISTICS (CONTD) Minimum Material Maximum NOT GO Boundary Functional Flank Diam. Pitch Diam. Diameter GO Thread Thd. Groove Thread Gages and Func. Size Limit Size Limit Size Limit Size Limit Size Limit Func. Func. Func. Measuring Equipment D, D, D2 D, C, C, B2 BI 4 AI 4.10 Cumulative form gaging - maximum-material and minimum-material dimensions collectively estab- lish cumulative form within limits defined by the aaalicable thread documents 5 Indicating Plain Diameter Gages 5.1 Major diameter type 5.2 Minor diameter type 6 Pitch Micrometer With Standard Contacts (Approxi- mately NOT GO Profile) Cone and Vee o o 7 Pitch Micrometer With Modified Contacts (Approxi- mately Pitch Diameter Contact) Cone and Vee o D 8 Thread Measurina Balls Withsuitable Measurino Means I I I I I 1 I I I I 9 Optical Comparator and Toolmakers Microscope With Suitable Fixturing and Cast Replica 10 Profile Tracing Eauiament With Suitable Fixturinq I I I I I I I J I I I 14 Surface Measuring Equipment or Texture Comparison Specimen 15 Roundness Equipment 16 Linear Measuring Machine With Required Accessories 17 Coordinate Measuring Machine With Required Acces- o o sories o o GENERAL NOTE: The notation NOT GO is used to indicate HJ, MN/MT, and NOT GO gages as described by the respective gage Standard. O O O O 10 COPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesCOPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesThe Standard is downloaded from Standard SharingSCREW THREAD GAGING SYSTEMS FOR DIMENSIONAL ACCEPTABILITY ASME B1.3M-1992 TABLE 2 SCREW THREAD GAGES AND MEASURING EQUIPMENT FOR INTERNAL PRODU - T THREAD CHARACTERISTICS (CONTD) C T 71 of Pitch 180 deg. 120 des. Cylinder Roundness of Pitch Cylinder Taper Lead Incl. Helix Variation H Major Diameter Minor Diameter Flank Angle Variation I Runout Limit Size Limit Size - Rad. L m 4.10 Cumulative Form 5.1 I 5.2 6 9 15 t 16 17 11 COPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesCOPYRIGHT American Society of Mechanical EngineersLicensed by Information Handling ServicesASME B 1 = 3 M 92 m 0757670 0534485 353 m ASME B1.3M-1992 System 21 21A (For M Threads per ANSI B1.18M) 22 23 NOTE: SCREW THREAD GAGING SYSTEMS FOR DIMENSIONAL ACCEPTABILITY TABLE 3 GAGING SYSTEMS FOR EXTERNAL THREADS Dimensions Inspected (For dimensiodgage combinations to be used, refer ta Table 1.) GO maximum material NOT GO functional diameter Major diameter GO maximum-material boundary Minimum-material boundary B and C NOT GO Root profile Major diameter GO maximum material Minimum material Pitch diameter or Thread groove diameter NOT GO functional diameter combined with control of: Lead (including helix) and Flank angle (over the length of full threa
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