螺母型号尺寸知识点梳理.docx

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1、六角螺母一C级(GBT41-20)六角薄螺母(GB/T6172.1-2000)螺母I型六角螺母一A和B级(GB/T6170-2000)标记示例螺纹规格D=MI2、性能级别为5级、不经表面处理、C级的六角螺母：螺母GB/T41-2000M12螺纹规格D=MI2、性能级别为8级、不经表面处理、A级的1型六角螺母：螺母GB/T6170-2000M12mm注：A级用于DW16,B级用于DI6螺纹规格DM3M4M5M6M8M1OM12M16M20M24M30M36M42eGB/T418.6310.8914.2017.5919.8526.1732.9539.5550.8560.7972.07GB/T617

2、06.017.668.7911.0514.3817.7720.0326.7532.9539.5550.8560.7972.02GB/T6172.I6.017.668.7911.0514.3817.7720.0326.7532.9539.5550.8560.7972.02SGB/T41810131618243036465565GB/T61705.57810131618243036465565GB/T6172.15.57810131618243036465565mGB/T415.66.17.99.512.215.918.722.325.431.534.9GB/T61702.43.24.75.26.

3、88.410.814.81821.525.63134GB/T6172.11.82.22.73.2456810121518211.各部位的尺寸单位：mm螺纹的公称直径（d）（2）M3M4M5M6M8M1OM12(M14)螺栓的螺距（P）0.50.70.811.251.51.752b参考1820222428323640dk最大（基准尺寸）*5.578.51013161821最大一5.687.228.7210.2213.2716.2718.2721.33最小5.326.788.289.7812.7315.7317.7320.67da最大3.64.75.76.89.211.213.715.7ds最大（

4、基准尺寸）34568101214最小2.863.824.825.827.789.7811.7313.73e最小2.873.444.585.726.869.1511.4313.72f最大0.510.600.600.681.021.021.451.45k最大（基准尺寸）34568101214最小2.863.824.825.707.649.6411.5713.57r最小0.10.20.20.250.40.40.60.6S公称（基准尺寸）2.5345681012最小2.523.024.025.026.028.02510.02512,032最大1栏2.5803.0804.0955.1406.1408.1

5、7510.17512.2122栏2.5603.0804.0955.0956.0958.11510.11512.142倒财头部fi7B1iOKf僵大)=17r/大)r1)=f得小）=根据附表的心t最小1.322.534567V最大0.30.40.50.60.811.21.4dw最小5.076.538.039.3812.3315.3317.2320.17W最小1.151.41.92.33.344.85.8螺纹的公称直径（C1）。）M16(M18)M20(M22)M24(M27)M30螺栓的螺距（P）22.52.52.5333.5b参考44485256606672dk最大（基准尺寸）24273033

6、364045最大*24.3327.3330.3333.3936.3940.3945.39最小23.6726.6729.6732.6135.6139.6144.61da最大17.720.222.424.426.430.433.4ds最大（基准尺寸）16182022242730最小15.7317.7319.6721.6723.6726.6729.67e最小16.0016.0019.4419.4421.7321.7325.15f最大1.451.872.042.042.042.892.89k最大（基准尺寸）16182022242730最小15.5717.5719.4821.4823.4826.4829

7、.48r最小0.60.60.80.80.811S公称（基准尺寸）14141717191922最小14.03214.03217.05017.05019.06519.06522.065最大1栏14.21214.21217.23017.23019.27519.27522.2752栏14.14214.142t最小8910111213.515.5V最大1.61.822.22.42.73dw最小23.1725.8728.8731.8134.8138.6143.61W最小6.87.78.69.510.412.113.1注：s（最大）的1栏适用于强度8.8及10.9及性状A2-50、A2-70的内容，2栏适用

8、于强度12.9的内容。但根据双方当事人之间协议，强度12.9的内容也可以适用1栏。螺纹的公称直径M20以上的s（最大）适用于所有的强度及性状内容。注：螺纹的公称直径中带括号的尽量不要使用。备注：1.头部的侧面带有直纹或网纹参照J1SBO951（滚花）。此时，dk（最大）为该表中的带的数值。此外，帘要没有滚花的货时，订货人必须指定。但该dk（最大）为该表中带.的数值。2.对手螺纹的公称直径建议使用的公称长度（。为粗线框内的内容。如果t比虚线位置短的为全螺纹，杆部的不完全螺纹长度约为3Po3.公称长度（。比虚线位置长的话，国（最大）及公（最小）根据下式决定。勾（最大）=公称长度）-bts（最小）=

9、tg（最大）-5P2内六角螺栓的1和fs及fg单位：mm螺纹的公称直径(d)M3M4M5M6M81Ismin.及gmax.公称长度minmaxIsmintgmaxsminfgmaxIsmintgmaxsminfgmaxisminfgmax54.765.2465.766.2487.718.29109.7110.291211.6512.351615.6516.352019.5820.422524.5825.424.573029.5830.429.5126.510483534.535.511.5159136114039.540.516.520141811165.75124544.545.51923162110.75175049.550.52428212615.75225554.455.6263120.75276059.460.6313625.75326564.465.630.75377069.470.635.75428079.480.645.75529089.390.710099.3100.7110109.3110.7120119.3120.7130129.2130.8140139.2140.8150149.2150.8160159.2160.8180179.2180.8200199.05200.95220219.05220.95240239.05240.95