各种螺纹加工中径表详表

1、螺纹规格大径d/mm中径d2/mm公差带及尺寸加工中径尺寸及公差备注公差带尺寸/mmM8x1.2587.1886g-0.0197.090.02-0.086M12x1.51211.0266g-0.03210.900.02-0.172M14x1.51413.0266g-0.03212.900.02-0.172M16x1.51615.0266g-0.03214.900.02-0.172M18x1.51817.0266g-0.03216.900.02-0.172M20x1.52019.0266g-0.03218.900.02-0.172M22x1.52221.0266g-0.03220.870.02-

2、0.172M24x1.52423.0266g-0.03222.870.02-0.182M26x1.52625.0266g-0.03224.900.02-0.182M28x1.52827.0266g-0.03226.900.02-0.182M30x1.53029.0266g-0.03228.900.02-0.182M36x1.53635.0266g-0.03234.900.02-0.1826h034.920.02-0.150M38x1.53837.0266g-0.03236.900.02-0.182M40x1.54039.0266g-0.03238.900.02-0.182表五:普通外螺纹(M)

3、基本尺寸表(摘自GB/T196-1981) 部分螺纹 说明:1.公制螺纹M的牙型角60,螺纹标记代号:M30x2左-6g,右旋和粗牙螺距不用标明,常用计算公式如下: H=0.P, D2=d2=D-0.P,D1=d1=D-1.P; 编制/日期: 审核/日期: 螺纹规格螺纹等级大径/mm中径/mm产品加工中径/mm备注最大最小最大最小3/8-24UNF2A9.4979.3148.8098.7128.750.027/16-20UNF2A11.07910.87410.25410.14710.180.021/2-20UNF2A12.66712.46111.84111.73211.750.029/16-1

4、8UNF2A14.25214.03113.33513.22113.250.025/8-18UNF2A15.84015.61814.92314.80314.820.025/8-24UNEF2A15.84515.66215.15615.05515.050.023/4-16UNF2A19.01218.77317.98117.85417.850.027/8-14UNF2A22.18421.92321.00620.86920.880.0211/16-12UN2A26.94426.65525.57025.42525.450.02511/4-12UNF2A31.70431.41530.33030.17330.200.0315/16-12UN2A33.28233.00531.92031.77331.820.0315/8-12UN2A41.22940.94039.85539.70539.800.032-12UN2A50.75450.46549.38049.22521/2-12UN2A63.45263.16262.07861.920表四:美制圆柱外螺纹基本尺寸表 部分螺纹 说明:1.美制螺纹的牙型角60,螺纹标记代号:3/8-24UNF(UN/UNEF/UNC)-3A,右旋和2A等级螺纹不用标明; 2.常用计算公式如下: P=25.4/n, H=0.P, D2=