公制粗牙螺紋

螺紋規(guī)格螺紋尺寸(mm)鉆頭直徑(mm)螺紋下孔徑(mm)內(nèi)螺紋小徑(mm)M332.52.52.476M443.33.33.276M55444.076M664.84.84.876M886.86.86.876M10108.28.28.276M121210.210.210.276M161614.214.214.276公制細(xì)牙螺紋螺紋規(guī)格螺紋尺寸(mm)鉆頭直徑(mm)螺紋下孔徑(mm)內(nèi)螺紋小徑(mm)F332.72.652.576F443.53.453.376F554.54.454.376F665.35.255.176F887.17.056.976F101098.958.876F121210.810.7510.676F141412.812.7512.676F161614.814.7514.676美制細(xì)牙螺紋

螺紋規(guī)格螺紋尺寸(UNF)鉆頭直徑(UNF)螺紋下孔徑(UNF)內(nèi)螺紋小徑(UNF)UNF-1B1.000-0.0060.884-0.0100.864-0.0100.849-0.010UNF-2B2.000-0.0131.767-0.0151.744-0.0151.726-0.015UNF-3B3.000-0.0192.679-0.0252.658-0.0252.639-0.025UNF-4B4.000-0.0263.553-0.0333.529-0.0333.512-0.033UNF-5B5.000-0.0334.489-0.0414.465-0.0414.447-0.041UNF-6B6.000-0.0415.388-0.0525.366-0.0525.348-0.052UNF-8B8.000-0.0577.349-0.0717.325-0.0717.312-0.071UNF-12B12.00-1/2"-1/2"(12B)11.899(≈11-5/8")11.667(≈11-3/4")11.569(≈11-1/2")英制細(xì)牙螺紋

螺紋規(guī)格螺紋尺寸(BSW)鉆頭直徑(BSW)螺紋下孔徑(BSW)內(nèi)螺紋小徑(BSW)BSW-1/4"1/4"3.175mm3.048mm2.963mmBSW-5/16"5/16"4.762mm4.609mm4.523mmBSW-3/8"3/8"6.350mm6.197mm6.097mmBSW-7/16"7/16"7.938mm7.780mm7.678mmBSW-1/2"1/2"12.700mm12.495mm12.355mmBSW-9/16"9/16"9.525mm

英制管用螺紋

螺紋規(guī)格螺紋尺寸(BSPT)鉆頭直徑(BSPT)螺紋下孔徑(BSPT)內(nèi)螺紋小徑(BSPT)NPT1/8"1/8"-282.867mm2.794mm2.711mmNPT1/4"1/4"-284.762mm4.609mm4.495mmNPT3/8"3/8"-196.350mm6.197mm6.042mmNPT1/2"