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["美制粗螺纹",{"$nulls":3},"英制管螺纹"]
["规格UNC外径","2级牙钻孔径",null,null,"规格","标准径","钻孔径"]
[null,"标准径","最大","最小",null,null,"最大","最小"]
["NO.1－64（1.854)",1.55,1.582,1.452,"PS1\\16-28",6.5,6.632,6.49]
["NO.2-56(2.184)",1.8,1.871,1.695,"PS1\\8-28",8.5,8.687,8.495]
["NO.3-48(2.515)",2.1,2.146,1.941,"Ps1\\4-19",11.4,11.549,11.341]
["NO.4-40(2.845)",2.3,2.385,2.157,"PS3\\8-19",15,15.054,14.846]
["NO.5-40(3.173)",2.6,2.679,2.487,"PS1\\2-14",18.5,18.733,18.489]
["NO.6-32(3.505)",2.8,2.895,2.642,"PS3\\4-14",24,24.259,23.975]
["NO.8-32(4.166)",3.4,3.53,3.302,"PS1\\4-11",30.2,30.471,30.111]
["NO.10-24(4.826)",3.9,3.962,3.683,"PS1-1\\4-11",38.8,39.132,38.772]
["NO.12-24(5.486)",4.5,4.597,4.344,"PS1-1\\2-11",44.8,45.025,44.665]
["1\\4-20",5.1,5.257,4.979,"PS2-1\\2-11",56.5,56.836,56.476]
["5\\16-18",6.6,6.731,6.401]
["3\\8-16",8,8.153,7.793,"英制管螺纹"]
["7\\16-14",9.4,9.55,9.144,"规格","标准径",null,"有效牙部之长","标准长度之"]
["1\\2-13",10.8,11.023,10.592,null,"使用铰刀时","不用铰刀时","度中螺牙内径","螺牙内 径"]
["9\\16-12",12.2,12.446,11.989,"PT1\\16-28",6.1,6.2,6.244,6.384]
["5\\8-11",13.6,12.868,13.386,"PT1\\8-28",8.1,8,8.249,8.388]
["3\\4-10",16.5,18.84,16.307,"PT1\\4-19",10.7,11,10.962,11.174]
["7\\8-9",19.5,19.761,19.507,"PT3\\8-19",14.2,14.5,14.448,14.685]
["1\\8-8",22.2,22.606,21.971,"PT1\\2-14",17.6,13,17.979,18.263]
["1-1\\8-7",25,25.349,24.6398,"PT3\\4-14",23,23.5,23.378,23.663]
["1-1\\4-7",28.2,28.524,27.813,"PT1\\4-11",29,29.5,29.459,29.822]
["1-3\\8-6",30.8,31.115,30.353,"PT1-1\\4-11",37.5,38,37.976,38.339]
["1-1\\2-6",34,34.29,33.528,"PT1-1\\2-11",43.4,44,43.869,44.232]
["1-3\\4-5",39.5,39.827,38.964,"PT2-2-11",54.9,55.5,55.412,55.844]
["1-4-1\\2",45.2,45.593,44.679]

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