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1、螺紋下孔徑表螺紋下孔徑表螺紋下孔徑表螺紋下孔徑表公制細牙螺紋公制細牙螺紋公制細牙螺紋公制細牙螺紋JIS B 0211-1982(單位單位單位單位：mm)螺紋尺寸鑽頭直徑崁合度區分：中(注1)2級(注2)下孔徑崁合度區分：中(註1)2級(註2) 內螺紋小徑最小直徑最大直徑M 2.5 0.352.22.22 (75%)2.1212.221 3 0.352.72.72 (75%)2.6212.721 3.5 0.353.23.22 (75%)3.1213.221 4 0.53.53.59 (75%)3.4593.599 4.5 0.544.09 (75%)3.9594.099 5 0.54.54.5
2、9 (75%)4.4594.599 5.5 0.555.09 (75%)4.9595.099 6 0.755.35.35 (80%)5.1885.378 7 0.756.36.35 (80%)6.1886.378 8 177.13 (80%)6.9177.153 8 0.757.37.35 (80%)7.1887.378 9 188.13 (80%)7.9178.153 9 0.758.38.35 (80%)8.1888.378 10 1.258.88.85 (85%)8.6478.912 10 199.13 (80%)8.9179.153 10 0.759.39.35 (80%)9.1889
3、.378 11 11010.13 (80%)9.91710.153 11 0.7510.310.35 (80%)10.18810.378 12 1.510.510.62 (85%)10.37610.676 12 1.2510.810.85 (85%)10.64710.912 12 11111.13 (80%)10.91711.153 14 1.512.512.62 (85%)12.37612.676 14 11313.13 (80%)12.91713.153 15 1.513.513.62 (85%)13.37613.676 15 11414.13 (80%)13.91714.153 16 1
4、.514.514.62 (85%)14.37614.676 16 11515.13 (80%)14.91715.153 17 1.515.515.62 (85%)15.37615.676 17 11616.13 (80%)15.91716.153 18 21616.2(85%)15.83516.210 18 1.516.516.62 (85%)16.37616.676 18 11717.13 (80%)16.91717.153 20 21818.2(85%)17.83518.210 20 1.518.518.62 (85%)18.37618.676 20 11919.13 (80%)18.91
5、719.153 22 22020.2(85%)19.83520.210 22 1.520.520.62 (85%)20.37620.676 22 12121.13 (80%)20.91721.153 24 22222.2(85%)21.83522.210 24 1.522.522.62 (85%)22.37622.676 24 12323.13 (80%)22.91723.153 25 22323.2(85%)22.83523.210 25 1.523.523.62 (85%)23.37623.676 25 12424.13 (80%)23.91724.153螺紋下孔徑表螺紋下孔徑表螺紋下孔徑
6、表螺紋下孔徑表公制細牙螺紋公制細牙螺紋公制細牙螺紋公制細牙螺紋JIS B 0211-1982(單位單位單位單位：mm)螺紋尺寸鑽頭直徑崁合度區分：中(注1)2級(注2)下孔徑崁合度區分：中(註1)2級(註2)內螺紋小徑最小直徑最大直徑M 26 1.524.524.62 (85%)24.37624.676 27 22525.2(85%)24.83525.210 27 1.525.525.62 (85%)25.37625.676 27 12626.13 (80%)25.91726.153 28 22626.2(85%)25.83526.210 28 1.526.526.62 (85%)26.376
7、26.676 28 12727.13 (80%)26.91727.153 30 32727.2(85%)26.75227.252 30 22828.2(85%)27.83528.210 30 1.528.528.62 (85%)28.37628.676 30 12929.13 (80%)28.91729.153 32 23030.2(85%)29.83530.210 32 1.530.530.62 (85%)30.37630.676 33 33030.2(85%)29.75230.252 33 23131.2(85%)30.83531.210 33 1.531.531.62 (85%)31.3
8、7631.676 35 1.533.533.62 (85%)33.37633.676 36 33333.2(85%)32.75233.252 36 23434.2(85%)33.83534.210 36 1.534.534.62 (85%)34.37634.676 38 1.536.536.62 (85%)36.37636.676 39 33636.2(85%)35.75236.252 39 23737.2(85%)36.83537.210 39 1.537.537.62 (85%)37.37637.676 40 33737.2(85%)36.75237.252 40 23838.2(85%)
9、37.83538.210 40 1.538.538.62 (85%)38.37638.676 42 43838.1(90%)37.67038.270 42 33939.2(85%)38.75239.252 42 24040.2(85%)39.83540.210 42 1.540.540.62 (85%)40.37640.676 45 44141.1(90%)40.67041.270 45 34242.2(85%)41.75242.252 45 24343.2(85%)42.83543.210 45 1.543.543.62 (85%)43.37643.676 48 44444.1(90%)43
10、.67044.270 48 34545.2(85%)44.75245.25248 24646.2(85%)45.83546.21048 1.546.546.62 (85%)46.37646.676 50 34747.2(85%)46.75247.252 50 24848.2(85%)47.83548.210 50 1.548.548.62 (85%)48.37648.676 註(1)等級：6H (2)基於 JIS B 0211-1982標準螺紋下孔徑表螺紋下孔徑表螺紋下孔徑表螺紋下孔徑表美制粗牙螺紋美制粗牙螺紋美制粗牙螺紋美制粗牙螺紋(單位單位單位單位：mm)螺紋尺寸鑽頭直徑2B 級 螺 紋
11、下 孔 徑內 螺 紋 小 徑最小直徑最大直徑NO.1 -64UNC1.551.57 (65%)1.4251.582 2 -561.81.86 (65%)1.6951.871 3 -482.12.14 (65%)1.9412.146 4 -402.32.36 (70%)2.1572.385 5 -402.62.69 (70%)2.4872.697 6 -322.82.86 (75%)2.6422.895 8 -323.43.52 (75%)3.3023.530 10 -243.93.91 (80%)3.6833.962 12 -244.54.57 (80%)4.3444.597 1/4-205.
12、15.25 (80%)4.9795.257 5/16-186.66.72 (80%)6.4016.731 3/8-1688.15 (80%)7.7988.153 7/16-149.49.50 (80%)9.1449.550 1/2-1310.811.0(80%)10.59211.023 9/16-1212.212.3(85%)11.98912.446 5/8-1113.613.8(85%)13.38613.868 3/4-1016.516.8(80%)16.30716.840 7/8- 919.519.6(85%)19.17719.761 1- 822.222.5(85%)21.97122.6
13、06 11/8- 72525.2(85%)24.63825.349 11/4- 728.228.4(85%)27.81328.524 13/8- 630.831.0(85%)30.35331.115 11/2- 63434.2(85%)33.52834.290 13/4- 539.539.8(85%)38.96439.827 2- 445.245.3(90%)44.67945.593螺紋下孔徑表螺紋下孔徑表螺紋下孔徑表螺紋下孔徑表美制細牙螺紋美制細牙螺紋美制細牙螺紋美制細牙螺紋(單位單位單位單位：mm)螺紋尺寸鑽頭直徑2B 級 螺 紋 下 孔 徑內 螺 紋 小 徑最小直徑最大直徑NO. 0 -
14、80UNF1.251.30 (65%)1.1821.305 1 -721.551.61 (65%)1.4741.612 2 -641.851.90 (65%)1.7561.912 3 -562.12.17 (70%)2.0252.197 4 -482.42.44 (70%)2.2712.458 5 -442.72.74 (70%)2.5512.740 6 -402.93.02 (70%)2.8203.022 8 -363.53.59 (75%)3.4043.606 10 -324.14.14 (80%)3.9634.165 12 -284.64.70 (80%)4.4964.724 1/4-2
15、85.55.56 (80%)5.3605.588 5/16-246.97.02 (80%)6.7827.035 3/8-248.58.61 (80%)8.3828.636 7/16-209.910.01 (80%)9.72910.033 1/2-2011.511.60 (80%)11.32911.607 9/16-1812.913.07 (80%)12.75113.081 5/8-1814.514.65 (80%)14.35114.681 3/4-1617.517.59 (85%)17.32317.678 7/8-1420.520.6(85%)20.27020.675 1-1223.223.5
16、(85%)23.11423.571 11/8-1226.526.7(80%)26.28926.746 11/4-1229.529.9(80%)29.46429.921 13/8-1232.833.0(85%)32.63933.096 11/2-123636.2(85%)35.81436.271螺紋下孔徑表螺紋下孔徑表螺紋下孔徑表螺紋下孔徑表縫紉機螺紋縫紉機螺紋縫紉機螺紋縫紉機螺紋(SM)(單位單位單位單位：mm)螺紋尺寸鑽頭直徑2B 級 螺 紋 下 孔 徑2級 內 螺 紋 小 徑最小直徑最大直徑SM1/16 - 801.251.28 (75%)1.2111.281 5/64 - 641.551.57 (80%)1.51
