英制螺纹底孔对照表.pdf

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1、英制螺纹底孔对照表切削丝锥切削丝锥切削丝锥粗牙螺纹细牙螺纹锥管螺纹钻头直径MinMax钻头直径MinMax钻头直径MinMax1#-64UNCΦ1.551.431.581#-72UNFΦ1.61.471.611/8"-27NPTΦ8.48.48.72#-56UNCΦ1.81.691.872#-64UNFΦ1.91.751.911/4"-18NPTΦ11.111.111.43#-48UNCΦ2.11.942.153#-56UNFΦ2.12.022.193/8"-18NPTΦ14.314.314.84#-40UNCΦ2.32.162.

2、394#-48UNFΦ2.42.272.461/2"-14NPTΦ17.917.918.36#-32UNCΦ2.82.642.906#-40UNFΦ32.823.013/4"-14NPTΦ232323.78#-32UNCΦ3.43.303.538#-36UNFΦ3.53.43.61"-11.5NPTΦ292929.710#-24UNCΦ3.93.683.9610#-32UNFΦ4.13.964.181-14"-11.5NPTΦ37.737.738.412#-24UNCΦ4.54.344.5912#-28UNFΦ4.74.54.72

3、1-1/2"-11.5NPTΦ444444.51/4"-20UNCΦ5.14.985.261/4"-28UNFΦ5.55.365.62"-11.5NPTΦ565656.65/16"-18UNCΦ6.66.406.735/16"-24UNFΦ6.96.787圆管螺纹3/8"-16UNCΦ87.808.153/8"-24UNFΦ8.58.388.63RC1/8"-28Φ8.38.38.57/16"-14UNCΦ9.49.149.557/16"-20UNFΦ9.99.7310RC1/4"-19Φ11.111.111.351/2"-13U

4、NCΦ10.810.5911.201/2"-20UNFΦ11.511.311.6RC3/8"-19Φ14.514.514.859/16"-12UNCΦ12.211.9912.459/16"-18UNFΦ12.912.713RC1/2"-14Φ18.118.118.55/8"-11UNCΦ13.613.3913.875/8"-18UNFΦ14.514.314.68RC3/4"-14Φ23.523.5243/4"-10UNCΦ16.516.3116.843/4"-16UNFΦ17.517.317.68RC1"-11Φ29.7529.7

5、30.157/8"-9UNCΦ19.519.1819.767/8"-14UNFΦ20.420.2720.67RC1-1/4"-11Φ38.238.238.81"-8UNCΦ22.221.9722.611"-12UNFΦ23.323.123.57RC1-1/2"-11Φ444444.7说明:如如如7/8"-9UNC指的是外径为7/8英寸,在一英寸距离内螺纹牙数为9牙牙牙(螺距为25.4/9=2.822)的粗牙螺纹,其中UNF指的是细牙螺纹,NPT指的是管螺纹.以上基本包括所有的英制螺纹.,请参考