普通螺纹直径与螺距系列

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1、普通螺纹直径与螺距系列GB/T193-2003（代替GB/T193-1981）Generalpurposemetricscrewthreads-Generalplan直径与螺距标准组合系列公称直径D、d螺距P第一系列第二系列第三系列粗牙细牙864321.51.2510.750.50.350.250.210.250.21.10.250.21.20.250.21.40.30.21.60.350.21.80.350.220.40.252.20.450.252.50.450.3530.50.353.50.60.3540.70.54.50.750.550.80.55.50.5610.75710.758

2、1.2510.7591.2510.75101.51.2510.75111.510.75121.751.51.2511421.51.25*1151.511621.51171.51182.521.51202.521.51222.521.5124321.512521.51261.527321.512821.51303.5(3)21.513221.5333.5(3)21.535**1.5364321.5381.5394321.540321.5424.54321.5454.54321.54854321.550321.55254321.5554321.5565.54321.5584321.5605.54

3、321.5624321.56464321.5654321.56864321.57064321.57264321.5754321.57664321.57828064321.5822856432906432956432100643210564321106432115643212064321258643213086432135643214086432145643215086432155643160864316564317086431756431808643185643190864319564320086432056432108643215643220864322564323086432356432

4、40864324564325086432556426086426564270864275642808642856429086429564300864M14×1.25仅用于火花塞。M35×1.5仅用于滚动轴承锁紧螺母。螺纹直径应优先选用第一系列，其次是第二系列，最后选用第三系列。尽可能地避免选用括号内的螺距。对直径自150至600mm的螺纹，若需要使用螺距大于6mm的螺纹，则应优先选用8mm的螺距。最大公称直径单位为毫米螺距最大公称直径0.5220.75331801.515022003300