螺纹下孔径表(无屑丝攻用).doc

螺紋下孔徑表(無屑絲攻用)公制螺紋(NRT) (單位：mm)螺紋尺寸1級螺紋用下孔徑2級螺紋用下孔徑RH精度最小最大(配合率)RH精度最小最大(配合率)M 1 0.2520.87 0.89 (10085)40.90 0.92 (10080)1.10.2520.97 0.99 (10085)41.00 1.02 (10080)1.20.2521.07 1.09 (10085)41.10 1.12 (10080)1.40.321.244 1.263 (10085)41.270 1.294 (10080)1.70.3521.51 1.54 (10080)41.54 1.58 (10075)2 0.421.78 1.82 (10080)41.81 1.85 (10075)2.30.422.08 2.12 (10080)42.11 2.15 (10075)2.50.4522.25 2.29 (10080)42.28 2.33 (10075)2.60.4522.35 2.39 (10080)42.38 2.43 (10075)3 0.532.74 2.78 (10080)52.76 2.81 (10075)3.50.633.18 3.21 (10085)53.20 3.26 (10075)4 0.743.63 3.67 (10085)63.65 3.70 (10085)5 0.844.57 4.62 (10085)64.59 4.66 (10080)6 145.45 5.51 (10085)75.48 5.57 (10080)7 146.45 6.51 (10085)76.48 6.57 (10080)8 1.2557.31 7.38 (10085)77.34 7.41 (10085)8 147.45 7.51 (10085)77.48 7.57 (10080)10 1.559.16 9.22 (10090)79.18 9.28 (10085)10 1.2559.31 9.38 (10085)79.34 9.41 (10085)10 159.46 9.52 (10085)79.48 9.57 (10080)12 1.75511.01 11.08 (10090)811.05 11.15 (10085)12 1.5511.16 11.22 (10090)711.18 11.28 (10085)12 1.25511.31 11.38 (10085)711.34 11.41 (10085)12 1511.46 11.52 (10085)711.48 11.57 (10080)14 2612.83 12.95 (10090)1012.92 13.04 (10085)14 1.5513.16 13.22 (10090)913.21 13.30 (10085)16 2614.87 14.95 (10090)1014.92 15.04 (10085)16 1.5515.16 15.22 (10090)915.21 15.30 (10080)18 2.5616.57 16.67 (10090)1116.63 16.78 (10085)18 1.5617.17 17.23 (10090)1017.22 17.31 (10085)20 2.5618.57 18.67 (10090)1118.63 18.78 (10085)20 1.5619.17 19.23 (10090)1019.22 19.31 (10085)螺紋下孔徑表(無屑絲攻用)美制粗牙螺紋(NRT) (單位：mm)螺紋尺寸2B級螺紋用下孔徑3B級螺紋用下孔徑RH精 度最小最大(配合率)RH精 度最小最大(配合率)NO. 2-56UNC41.96 2.02 (10065)31.95 2.01 (10065)3-4842.25 2.32 (10065)32.23 2.31 (10065)4-4052.52 2.60 (10070)32.50 2.58 (10070)5-4052.86 2.93 (10070)32.83 2.91 (10070)6-3253.09 3.17 (10075)33.06 3.14 (10075)8-3263.75 3.83 (10075)43.74 3.82 (10075)10-2464.26 4.35 (10080)44.24 4.32 (10080)12-2464.92 5.01 (10080)44.90 4.96 (10085)1/4 -2065.66 5.76 (10080)45.64 5.74 (10080)5/16 -1877.18 7.29 (10080)57.15 7.24 (10085)3/8 -1678.66 8.78 (10080)58.63 8.73 (10085)7/16 -14710.11 10.25 (10080)510.08 10.19 (10085)1/2 -13810.62 11.78 (10080)611.60 11.68 (10090)9/16 -121013.14 13.27 (10085)813.11 13.24 (10085)5/8 -111114.62 14.76 (10085)814.58 14.67 (10090)3/4 -101217.67 17.88 (10080)917.63 17.74 (10090)7/8 - 91220.68 20.85 (10085)920.64 20.75 (10090)1 - 81323.65 23.84 (10085)1023.61 23.74 (10090) 螺紋下孔徑表(無屑絲攻用)美制細牙螺紋(NRT) (單位：mm)螺紋尺寸2B級螺紋用下孔徑3B級螺紋用下孔徑RH精 度最小最大(配合率)RH精 度最小最大(配合率)NO. 2-64UNF31.98 2.04 (10065)21.97 2.03 (10065)3-5642.29 2.35 (10065)32.28 2.34 (10065)4-4842.57 2.64 (10070)32.56 2.63 (10070)5-4442.88 2.95 (10070)32.87 2.94 (10070)6-4053.19 3.26 (10070)33.16 3.22 (10075)8-3653.80 3.88 (10075)43.79 3.86 (10075)10-3254.41 4.48 (10080)44.40 4.46 (10080)12-2855.00 5.08 (10080)44.99 5.06 (10080)1/4 -2855.86 5.93 (10080)45.85 5.92 (10080)5/16-2467.38 7.46 (10080)57.36 7.43 (10085)3/8 -2468.96 9.05 (10080)58.95 9.02 (10085)7/16-20710.44 10.54 (10080)510.41 10.49 (10085)1/2 -20712.02 12.12 (10080)512.00 12.05 (10090)9/16-18913.55 13.66 (10080)713.53 13.58 (10090)5/8 -18915.14 15.25 (10080)715.11 15.17 (10090)3/4 -161018.22 18.32 (10085)718.18 18.25 (10090)7/8 -141121.27 21.38 (10085)821.23 21.27 (10095)1 - 121224.28 24.41 (10085)924.24 24.32 (10090)英制管用平行螺紋(NRT) (單位：mm)螺紋尺寸RH精 度最小最大(配合率)PF 1/869.24 9.35 (10080) 1/4712.4112.62 (10075)3/8715.9216.12 (10075)1/2819.9320.15 (10080)3/4825.4125.64 (10080) 螺紋下孔徑表(無屑絲攻用) 公制螺紋(HRT) (單位：mm)螺紋尺寸1級螺紋用下孔徑2級螺紋用下孔徑RH精 度最小最大(配合率)RH精 度最小最大(配合率)M 1 0.2520.8580.879 (10085)40.8580.887 (10080)1.20.2521.0581.079 (10085)41.0581.087 (10080)1.40.321.23 1.26 (10085)41.23 1.26 (10080)1.60.3521.40 1.44 (10080)41.40 1.45 (10075)1.70.351.50 1.54 (10080)41.50 1.55 (10075)1.80.3521.60 1.64 (10080)41.60 1.65 (10075)2 0.421.77 1.82 (10080)41.77 1.82 (10080)2 0.2521.8581.887 (10080)1.8581.887 (10080)2.30.42.07 2.12 (10080)42.07 2.13 (10075)2.50.4532.24 2.30 (10080)52.24 2.31 (10075)2.60.452.34 2.40 (10080)52.34 2.41 (10075)3 0.632.72 2.73 (10090)52.66 2.73 (10090)3 0.552.72 2.77 (10080)62.72 2.78 (10075)3 0.3532.80 2.84 (10080)52.80 2.85 (10075)3.50.633.16 3.21 (10085)53.16 3.25 (10075)4 0.7533.57 3.64 (10085)63.57 3.64 (10085)4 0.763.60 3.66 (10085)73.60 3.66 (10085)4 0.533.71 3.77 (10080)63