1、公制螺纹参数简明表标准螺纹外螺纹大径内螺纹小径M12*1,251211,647M12*1,251211,376M12*1,751210,106M14*1,51412,376M14*21411,835M16*1,51614,376M16*21613,835M18*1,51816,376M18*21815,835M18*2,51815,294M20*1,52018,376M20*22017,835M20*2,52017,294M22*1,52220,376M22*22219,835M22*2,52219,294M27*1,52725,376M27*22724,835M27*32723,752M30
2、*1,53028,376M30*23027,835M30*3,53026,211M33*1,53331,376M33*23330,835M33*3,53329,211M36*23633,835M36*33632,752M36*43631,670M39*23936,835M39*33935,752M39*43934,670M45*24542,835M45*34541,752M45*4,54540,129M52*25249,835M52*35248,752M52*55246,587M64*26461,835常用美标螺纹技术参数简明表（UNF）标准螺纹外螺纹大径内螺纹小径1/4-286.355.36
3、75/6-247.9386.7923/8-249.5258.3797/16-2011.1129.7381/2”-2012.711.3269-16-1814.28812.7615/8-1815.87514.3483/4-1619.05017.337/8-1422.22520.2621-1225.40023.1091-1/16-1226.98024.691-1/8”-1228.57526.2841-1/4-1231.75029.4591-5/16-1233.33031.041-3/8-1234.92532.6341-1/2-1238.10035.809常用英制螺纹技术参数简明表（BSP）标准规格外
4、螺纹大径内螺纹小径1/8”-289.7288.5661/4-1913.15711.4453/8-1916.66214.9501/2-1420.95518.6313/4-1426.44124.1171-1133.24930.2911-1/4-1141.91038,9521-1/2-1147.80344.845常用美标锥螺纹参数简明表（NPT）标准规格外螺纹大径内螺纹小径1/16-277.8956.3891/8-2710.2728.7661/4-1813.57211.3143/8-1817.05514.7971/2-1421.22318.3213/4-1426.56823.6661-11,533.22829.6941-1/4-11,541.98538.451
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