公 英制螺纹对照表.doc

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1、管螺纹与标准螺纹换算标准尺寸代号每英寸牙数螺距螺纹直径（in)np大径D、d小径D1、d11/16280.9077.7236.5611/8280.9079.72808.5661/4191.33713.15711.4453/8191.33716.66214.951/2141.81420.95518.6315/8141.81422.91120.5873/4141.81426.44124.1177/8141.81430.20127.8771112.30933.24930.2911-1/8112.30937.89734.939

2、1-1/4112.30941.9138.9521-1/2112.30947.80344.8451-3/4112.30953.74650.7882112.30959.61456.6562-1/4112.30965.7162.7522-1/2112.30975.18472.2262-3/4112.30981.53478.5783112.30987.88484.9263-1/2112.309100.3397.3724112.309113.03110.0725112.309138.43135.4726112.309163.83

3、160.872公制标准牙的牙距如下：M1*0.25M1.6*0.35M2*0.4M2.5*0.45M3*0.5M4*0.4M5*0.8M6*1.0M8*1.25M10*1.5M12*1.75M14*2.0M16*2.0M18*2.5M20*2.5M22*2.5M24*3.0M27*3.0M30*3.5M33*3.5M36*4.0M39*4M42*4.5M45*4.5M48*5M52*5M56*5.5M60*5.5M64*6