搓（滚）牙径标准一、目的：通过规范外螺纹产品的搓（滚）牙径，以确保作业的标准化从而保障产品质量满足客户的要求。二、范围：需搓（滚）牙产品均属之。三、引用标准：JB/T9193-1999ASMEB1.1-1989四、内容4.1打头类产品搓（滚）牙径标准4.1.1机牙搓（滚）牙径标准(单位:mm)：序号螺纹规格铁线径-0.02不锈钢线径-0.02未注公差为+0.02/-0.01产品外径碳钢不锈钢/铜MAXMIN01M2.0×0.406g1.661.671.651.671.691.981.8702M2.3×0.406g1.962.001.971.992.282.2003M2.5×0.456g2.132.152.142.162.482.3804M2.6×0.456g2.232.252.23/2.252.262.682.6005M3.0×0.506g2.582.602.592.632.962.8706M3.5×0.606g3.033.053.013.053.483.3507M4.0×0.706g3.433.453.43/3.453.473.983.8408M4.5×0.756g3.903.903.923.944.454.3409M5.0×0.806g4.364.354.364.394.964.8310M6.0×1.006g5.235.255.245.285.955.8211M8.0×1.256g7.077.087.077.097.947.8012M10×1.506g8.908.928.918.939.949.7613M12×1.756g10.7210.7210.7210.7411.9411.75142-56UNC-2A1.841.851.841.862.182.08154-40UNC-2A2.362.402.362.402.802.70166-32UNC-2A2.892.922.912.943.463.33178-32UNC-2A3.573.553.573.604.123.991810-32UNF-2A4.224.254.224.254.784.641910-24UNC-2A4.024.054.054.094.784.622012-24UNC-2A4.704.704.704.755.445.26213/16-24UNC-2A3.974.024.004.024.724.59225/16-18UNC-2A6.926.956.936.957.887.68235/16-24UNF-2A7.167.187.167.187.887.72243/8-16UNC-2A8.388.428.408.429.469.24253/8-24UNC-2A8.748.758.748.769.469.32261/4-20UNC-2A5.435.455.435.476.306.124.1.2三角牙搓牙径标准(单位:mm)：P型B型序号规格牙数搓牙径径外径（C）序号规格牙数搓牙径外径（C）搓（滚）牙径标准01M2321.521.94~2.0401M2401.571.88~1.9602M2.3281.792.25~2.3502M2.3321.812.18~2.2603M2.6242.042.54~2.6403M2.6282.072.47~2.5504M3202.332.93~3.0504M3242.372.85~2.9505M3.5182.753.45~3.5705M3.5202.783.34~3.4606M4163.093.90~4.0206M4183.143.81~3.9107M5143.874.89~5.0307M5164.004.78~4.90S型序号规格牙数搓牙径外径（C）序号规格牙数搓牙径外径（C）01M20.401.671.88~1.96082#561.842.03~2.1302M2.30.401.962.18~2.26093#482.122.36~2.4603M2.60.452.242.48~2.56104#402.372.68~2.7804M30.502.592.87~2.95115#402.703.00~3.1105M3.50.603.013.36~3.44126#322.923.27~3.4306M40.703.423.85~3.93138#323.583.93~4.0907M50.804.364.84~4.921410#244.024.54~4.70C型序号规格牙数搓牙径外径（C）序号规格牙数搓牙径外径（C）01M20.401.601.81~1.9005M3.50.602.913.24~3.3502M2.30.401.902.11~2.2006M40.703.323.70~3.8303M2.60.452.152.39~2.4907M50.804.224.68~4.8104M30.502.512.77~2.88注：S、C型公制牙纹的牙数栏目是螺距注：附P、B、S、C四种三角牙螺丝类型图例P型B型S型C型搓（滚）牙径标准4.2车床类产品搓（滚）牙径规定：按4.1.1的规定只是其公差统一规定为“+0.02/-0.01mm”。
