美制管螺纹管用螺纹PT)钻头径()内英制尺寸规格钻头径规格有效螺纹长度用内径标用NPTNPSC较刀时不用较刀时使用铰刀时不使用铰刀时PT1116-286.16.26.24465.940.23)6.150.242)6.35(0.250)pT18-288.18.28.24918-278.33(0.328)8.43(0.332)8.740.344)PT14-1910.71110.9261114-1810.72(0.42211.13(0.438)11.130.438PT318-1914.214.514.4481438-1814.270.52614.27(0.562)14.680.57817.61817.9791812-1417.48(0.68817.86(0.703)18.260.719PT34-142323.523.3782334-1422.63(0.89123.0(0.906)23.42(0.922PT1-112929.529.459291-111228.58(1.12528.98(1.414)29.36(1.156PT114-11373837.97638114-11137.31(1.46937.69(1.484)38.1(1.5)PT112-11434443.86942112-11143.26(1.70343.66(1.719)44.45(1.750PT2-115455.555.412552-111255.17(2.17255.58(2.188)56.36(2.219管用螺纹(PF)212-865.482.57866.27(2.609)67.46(2.656AB级螺纹内径乾封美制管螺纹规格钻头径上限下限钻头径()内英制尺寸PF1116-286.76.8436.561规格NPTF8.78.8488.566NPSF使用铰刀时不使用铰刀时PF14-1911.711.8911.445116-275.940.234)6.15(0.242)6.250.246)PF38-1915.215.39514.958.330.328)8.430.322)8.61(0.339)PF12-141919.17218.63114-1810.72(0.42211.13(0.438)11.13(0.438PF58-142121.12820.58738-1814.27(0.56214.27(0.526)14.68(0.578PF34-1424.524.65824.11712-1417.48(0.68817.860.703)17.860.703P℉78-1428.228.41827.88734-1422.63(0.89123.01(0.906)23.420.922PF1-1130.530.93130.2911-111228.58(1.12528.98(1.141)29.36(1.156PF118-1135.235.57934.93.9114-11137.31(1.46937.691.484)PF114-1139.239.59238.952112-11143.26(1.70343.66(1.719)PF112-114545.45844.8452-111255.17(2.17255.58(2.188)PF134-115151.42850.788212-865.48(2.57866.27(2.609)PF2-115757.29656.656管用螺纹(PS)规格钻头径螺纹内径上限下限PS116-286.56.6326.48.58.6378.4PS14-1911.411.54911.3PS38-191515.05414.8PS12-1418.518.77318.4PS34-142424.25923.9PS1-1130.230.47130.1PS114-1138.839.13238.7PS112-1144.845.02544.6PS-1156.556.86356.4