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1、100%90%80%70%100%90%80%70% M1.0 0.2540.860.870.890.90M9.0 1.578.298.368.438.50 0.230.890.900.910.92178.438.498.558.60 M1.1 0.2540.960.970.991.000.7578.578.628.668.70 0.230.991.001.011.020.568.728.748.778.80 M1.2 0.2541.061.071.091.10M101.579.159.239.329.40 0.231.091.101.111.121.2579.299.369.439.50 M
2、1.4 0.341.231.251.261.28179.439.499.559.60 0.231.291.301.311.320.7579.579.629.669.70 M1.6 0.3541.401.421.441.460.569.729.749.779.80 0.231.491.501.511.52M111.510 10.1510.2310.3210.40 M1.7 0.3541.501.521.541.561810.4310.4910.5510.60 0.241.591.601.611.620.75810.5710.6210.6610.70 M1.8 0.3541.601.621.641
3、.66M12 1.75811.0111.1111.2111.31 0.231.691.701.711.721.5811.1511.2311.3211.40 M2.0 0.441.771.801.821.841.25811.2911.3611.4311.50 0.2541.861.871.891.911811.4311.4911.5511.60 M2.2 0.4541.941.972.002.02M14210 12.8712.9813.0913.21 0.542.062.072.092.101.5913.1513.2313.3213.40 M2.3 0.442.072.102.122.141.2
4、5813.2913.3613.4313.50 0.2542.162.172.192.201813.4313.4913.5513.60 M2.5 0.4542.242.272.302.32M151.5914.1514.2314.3214.40 0.3542.302.322.342.361814.4314.4914.5514.60 M2.6 0.4542.342.372.402.42M16210 14.8714.9815.0915.21 0.3552.402.422.442.461.5915.1515.2315.3215.40 M3.0 0.652.662.692.732.761815.4315.
5、4915.5515.60 0.552.722.742.772.80M171.511 16.1516.2316.3216.40 0.3552.802.822.842.861916.4316.4916.5516.60 M3.5 0.653.163.193.233.26M182.511 16.5816.7216.8717.01 0.3553.303.323.343.36211 16.8716.9817.0917.21 M4.0 0.7563.573.623.663.701.510 17.1517.2317.3217.40 0.763.603.643.683.721917.4317.4917.5517
6、.60 0.563.723.743.773.80M202.511 18.5818.7218.8719.01 M4.5 0.7564.074.124.164.20211 18.8718.9819.0919.21 0.564.224.244.274.301.510 19.1519.2319.3219.40 M5.0 0.964.494.544.594.641919.4319.4919.5519.60 0.864.554.594.644.68M222.511 20.5820.7220.8720.01 0.564.724.744.774.80211 20.8720.9821.0921.21 M5.5
7、0.964.995.045.095.141.510 21.1521.2321.3221.40 0.565.225.245.275.301921.4321.4921.5521.60 M6.0175.435.495.555.60M24211 22.8722.9823.0923.21 0.7565.575.625.665.701.510 23.1523.2323.3223.40 0.565.725.745.775.801912.4323.4923.5523.60 M7.0176.436.496.556.60 0.7566.576.626.666.70 0.566.726.746.776.80 M8.0 1.2577.297.367.437.50 177.437.497.557.60 0.7577.577.627.667.70 0.567.727.747.777.80 【注】1.本表的寸法为参考用，请先试着加工 再决定下孔径。 饱和率 下孔径 （mm） 2级 用精 度番 号 2.精度番号是以母螺纹的公差80%为目标 做决定。 无屑丝攻下孔径表无屑丝攻下孔径表 公制螺纹的下孔径和无屑丝攻的精度番号公制螺纹的下孔径和无屑丝攻的精度番号 外径 牙距外径 牙距 2级 用精 度番 号 饱和率 下孔径 （mm）
