常用螺纹底孔加工标准（推介）

常用螺纹底孔加工标准一、目的规范常用螺纹底孔的加工标准。二、范围SAE所有加工的零件特殊要求除外三、参考文件无四、定义螺纹底孔即螺纹攻牙前的预加工孔。五、责任1加工者按此标准加工；2检验者按此标准检测；六、内容1公制普通粗牙螺纹单位MM2公制普通细牙螺纹单位MM3美制普通细牙螺纹底孔直径螺纹规格底孔直径螺纹规格底孔直径螺纹规格25底孔直径1751251451618105911M6X15M16X214M18X25156M4X0733M3X05125M7X16M1X025075M12X025095M11X025085M14X03M5X08M2X0416M10X1586M30X3542M20X25M22X25M16X035M18X035145M8X12568M27X3242M25X04517521M14X2M22X045M12X175M5X05M6X075M7X075M8X135456353螺纹规格M2X025M4X05M3X035103212M24X3176196M10X127122663564487螺纹规格M10X125M12X15M14X15M16X15M18X20M20X20底孔直径88螺纹规格UNF080172264544640836底孔直径MM125155185210240270290350英制参考钻头3/6453504542373329螺纹规格UNF103212281/4283/8241/2205/8181/4167/814底孔直径MM4104605502050850115014501750BU6加工标准手册第1页，共2页常用螺纹底孔加工标准新科公司常用螺纹底孔加工标准4美制普通粗牙螺纹5英制惠氏螺纹底孔直径单位MM6美制管螺纹底孔直径单位MM7英制管螺纹底孔直径单位MM10729NPT用铰刀61底孔直径1111/2PS1/419PS1111150底孔直径MM450英制参考钻头53螺纹规格3/414123螺纹规格1/1627底孔直径29503600256348螺纹规格UNC164Q29/64英制参考钻头21英制参考钻头49/64143底孔直径MM232037/6411/1613/16螺纹规格UNF11211/41211/212440540英制参考钻头59/64111/64127/646328321024底孔直径MM1551802002302602803503905/8113/4105047433852066080010801220136025螺纹规格UNC12241/4205/16183/81636291/2139/16121650英制参考钻头167F5/1627/6431/6417/3221/3211/26螺纹规格UNC7/891811/47底孔直径MM1950222028203400137螺纹规格W1/8407/817/64111/32螺纹规格W9/1612底孔直径265W5/3232325W5/8118W11/4725W1/42051W7/89195W5/161866W18224375W3/410167W3/16248431113W1/212W7/161494W11/471070283W3/8163/8181/2148331072142717481/8271/41814271786NPS635874111314681826不用铰刀62511/4111/211/2111/22111/2底孔直径NPT用铰刀2263285837314366PS1/1628PS1/8285558不用铰刀23012898376944045596860PS1/828PS3/41444455636螺纹规格NPS234229363810820PS1/21417618241螺纹规格PS1/419底孔直径66PT1/1628底孔直径用铰刀11145PS1/214186不用铰刀6162810PS3/81915PS3/81914223235PS3/414295PS11/411389P