以下是公制標準內螺紋(粗牙)的攻牙孔徑表: 注:下面所說的攻牙都是指擠牙絲攻(即無屑絲攻),而不是車削絲攻 |
公制粗牙的攻牙前孔徑表及攻牙后孔徑表 單位MM | 規格 | 螺紋最小孔徑 | 螺紋最大孔徑 | 攻牙前最小孔徑 | 攻牙后最大孔徑 | M 1*0.25 | 0.73 | 0.78 |
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| M1.1*0.25 | 0.83 | 0.89 |
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| M1.2*0.25 | 0.93 | 0.98 |
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| M1.4*0.3 | 1.08 | 1.14 | 1.23 | 1.26 | M1.6*0.35 | 1.22 | 1.32 |
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| M1.7*0.35 | 1.33 | 1.42 | 1.5 | 1.55 | M1.8*0.35 | 1.42 | 1.52 |
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| M 2*0.4 | 1.57 | 1.67 | 1.77 | 1.83 | M2.2*0.45 | 1.71 | 1.84 | 1.95 | 2.01 | M2.3*0.4 | 1.87 | 1.97 | 2.07 | 2.13 | M2.5*0.45 | 2.01 | 2.14 | 2.25 | 2.31 | M2.6*0.45 | 2.12 | 2.23 | 2.35 | 2.41 | M 3*0.5 | 2.46 | 2.6 | 2.72 | 2.79 | M3.5*0.6 | 2.85 | 3.01 | 3.16 | 3.24 | M 4*0.7 | 3.24 | 3.42 | 3.6 | 3.69 | M4.5*0.75 | 3.69 | 3.88 | 4.07 | 4.17 | M 5*0.8 | 4.13 | 4.33 | 4.55 | 4.65 | M 6*1.0 | 4.92 | 5.15 | 5.43 | 5.55 | M 7*1.0 | 5.92 | 6.15 | 6.43 | 6.55 | M 8*1.25 | 6.65 | 6.91 | 7.29 | 7.42 | M 9*1.25 | 7.65 | 7.91 | 8.29 | 8.42 | M 10*1.5 | 8.38 | 8.68 | 9.15 | 9.3 | M 11*1.5 | 9.38 | 9.68 | 10.15 | 10.3 | M 12*1.75 | 10.11 | 10.44 | 11.01 | 11.19 | M 14*2.0 | 11.84 | 12.21 |
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| M 16*2.0 | 13.84 | 14.21 |
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以下是美制UNC粗牙的攻牙徑表及內螺紋內徑表 |
規格 | 螺紋最小孔徑 | 螺紋最大孔徑 | 攻牙最小孔徑 | 攻牙最大孔徑 | NO. 1-64UNC | 1.43 | 1.58 | 1.63 | 1.71 | NO. 2-56UNC | 1.69 | 1.87 | 1.93 | 2.02 | NO. 3-48UNC | 1.94 | 2.15 | 2.22 | 2.32 | NO. 4-40UNC | 2.16 | 2.39 | 2.49 | 2.61 | NO. 5-40UNC | 2.49 | 2.7 | 2.82 | 2.92 | NO. 6-32UNC | 2.64 | 2.9 | 3.05 | 3.19 | NO. 8-32UNC | 3.3 | 3.53 | 3.71 | 3.83 | NO.10-24UNC | 3.68 | 3.96 | 4.23 | 4.37 | NO.12-24UNC | 4.34 | 4.6 | 4.88 | 5.02 | 1/4 -20UNC | 4.98 | 5.26 | 5.63 | 5.77 | 5/16-18UNC | 6.4 | 6.73 | 7.13 | 7.3 | 3/8 -16UNC | 7.8 | 8.15 | 8.63 | 8.8 | 7/16-14UNC | 9.14 | 9.55 | 10.09 | 10.29 | 1/2 -13UNC | 10.59 | 11.02 | 11.6 | 11.82 | 9/16-12UNC | 11.99 | 12.45 |
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| 5/8 -11UNC | 13.39 | 13.87 |
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| 3/4 -10UNC | 16.31 | 16.84 |
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| 7/8 -9 UNC | 19.18 | 19.76 |
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| 1 -8 UNC | 21.97 | 22.61 |
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