美制螺纹常用规格极限尺寸表.xls

美制粗螺纹美制细螺纹规格（UNC)标准径2级牙钻孔径规格（UNF)标准径2级牙钻孔径最大最小最大NO.1-64(1.854)1.551.5821.425NO.0-80(1.524)1.251.305NO.2-56(2.184)1.801.8711.695NO.1-72(1.854)1.551.612NO.3-48(2.515)2.102.1461.941NO.2-64(2.184)1.851.912NO.4-40(2.845)2.302.3852.157NO.3-56(2.515)2.102.197NO.5-40(3.175)2.602.6972.487NO.4-48(2.845)2.402.458NO.6-32(3.505)2.802.8952.642NO.5-44(3.175)2.702.740NO.8-32(4.166)3.403.5303.302NO.6-40(3.505)2.903.022NO.10-24(4.826)3.903.9623.683NO.8-36(4.166)3.503.606NO.12-24(5.486)4.504.5974.344NO.10-32(4.826)4.104.1651/4-205.105.2574.979NO.12-28(5.846)4.604.7245/16-186.606.7316.4011/4-285.505.5883/8-168.008.1537.7985/16-246.907.0357/16-149.409.5509.1443/8-248.508.6361/2-1310.8011.02310.5927/16-209.9010.0339/16-1212.2012.44611.9891/2-2011.5011.6075/8-1113.6012.86813.3869/16-1812.9013.0813/4-1016.5018.84016.3075/8-1814.5014.6817/8-919.5019.76119.1773/4-1617.5017.6781-822.2022.60621.9717/8-1420.5020.6751-1/8-725.0025.34924.6381-1223.2023.5711-1/4-728.2028.52427.8131-1/8-1226.5026.7461-3/8-630.8031.11530.3531-1/4-1229.5029.9211-1/2-634.0034.29033.5281-3/8-1232.8033.0961-3/4-539.5039.82738.9641-1/2-1236.036.2712-4-1/245.2045.59344.679美制迫牙丝攻钻孔径美制特细螺纹规格精度等级规格（UNEF)标准径2级牙钻孔径G4-G6G7-G8G9最大NO.2-56UNC1.94--NO.12-324.704.826NO.3-482.23--1/4--325.605.690NO.4-402.50--5/16-327.107.264NO.5-402.83--3/8-328.708.865NO.6-323.07--7/16-2810.2010.338NO.8-323.733.77-1/2-2811.8011.938NO.10-244.244.30-9/16-2413.2013.386NO.12-244.904.96-5/8-2414.8014.9861/4-20-5.72-3/4-2017.8017.9585/16-18-7.24-7/8-2021.0021.1333/8-16-8.748.811-2024.0024.3087/16-14-10.2010.30美制管螺纹1/2-1311.2711.82NO.2-64UNF1.97--规格钻孔径NO.3-562.27--NPTNO.4-482.56--使用绞刀时不用绞刀时NO.5-442.86--1/16-276.106.25NO.6-403.16--1/8-278.338.43NO.8-363.78--1/4-1810.7211.13NO.10-324.394.43-3/8-1814.2714.27NO.12-284.995.04-1/2-1417.4817.861/4-285.855.90-3/4-1422.6323.015/16-247.367.41-1-11-1/228.5828.983/8-24-9.00-1-1/4-11-1/237.3137.697/16-20-10.4810.541-1/2-11-1/243.6644.041/2-20-12.0712.132-11-1/255.5855.96英制电器螺纹规格钻孔径2BA4.0-4.23BA4BA3.0-3.25BA2.7-2.86BA2.4