螺紋公稱 | 攻牙鑽孔尺寸 | 螺紋牙套長度(圈數)±1/4 | ||||||
公制粗牙螺紋 | 最小 | 最大 | 鑽頭 | 1D | 1.5D | 2D | 2.5D | 3D |
M3-0.5 | 3.12 | 3.20 | 3.1 | 4 | 6 5/8 | 9 1/4 | 11 7/8 | 14 1/2 |
M4-0.7 | 4.17 | 4.30 | 4.2 | 3 7/8 | 6 3/8 | 8 7/8 | 11 3/8 | 13 7/8 |
M5-0.8 | 5.16 | 5.33 | 5.2 | 4 3/8 | 7 1/8 | 9 7/8 | 12 5/8 | 15 1/2 |
M6-1.0 | 6.25 | 6.42 | 6.3 | 4 1/4 | 7 1/8 | 10 | 12 7/8 | 15 3/4 |
M7-1.0 | 7.25 | 7.42 | 7.3 | 5 1/2 | 8 5/8 | 11 3/4 | 14 1/8 | 17 1/4 |
M8-1.25 | 8.31 | 8.52 | 8.4 | 4 5/8 | 7 3/8 | 10 1/4 | 13 1/8 | 16 |
M10-1.5 | 10.37 | 10.62 | 10.5 | 5 | 8 | 11 | 14 | 17 |
M12-1.75 | 12.43 | 12.73 | 12.5 | 5 | 8 1/4 | 11 3/8 | 14 1/2 | 17 3/4 |
M14-2.0 | 14.49 | 14.83 | 14.5 | 5 1/4 | 8 1/2 | 11 3/4 | 15 | 18 3/8 |
M16-2.0 | 16.49 | 16.83 | 16.5 | 6 1/8 | 9 7/8 | 13 1/2 | 17 1/4 | 21 |
M18-2.5 | 18.58 | 19.04 | 19.0 | 5 5/8 | 9 | 12 1/2 | 15 5/8 | 19 |
M20-2.5 | 20.58 | 21.04 | 21.0 | 6 3/8 | 10 1/8 | 14 | 17 3/8 | 21 1/8 |
M22-2.5 | 22.58 | 23.04 | 23.0 | 7 1/8 | 11 1/4 | 15 1/2 | 19 | 23 1/8 |
公制細牙螺紋 | 最小 | 最大 | 鑽頭 | 1D | 1.5D | 2D | 2.5D | 3D |
M8-1.0 | 8.25 | 8.42 | 8.3 | 6 | 9 5/8 | 13 1/8 | 16 1/2 | 20 1/8 |
M10-1.0 | 10.25 | 10.42 | 10.3 | 7 7/8 | 12 3/8 | 17 | 21 | 25 1/2 |
M10-1.25 | 10.31 | 10.52 | 10.4 | 5 7/8 | 9 1/2 | 13 1/8 | 16 3/4 | 20 3/8 |
M12-1.25 | 12.31 | 12.52 | 12.4 | 7 3/8 | 11 5/8 | 16 | 20 1/4 | 24 1/2 |
M12-1.5 | 12.37 | 12.62 | 12.5 | 6 | 9 1/2 | 13 1/8 | 17 | 20 3/4 |
M14-1.5 | 14.37 | 14.62 | 14.5 | 7 | 11 1/8 | 15 3/8 | 20 | 24 1/4 |
M16-1.5 | 16.37 | 16.62 | 16.5 | 8 1/2 | 13 3/8 | 18 1/8 | 22 3/4 | 27 5/8 |
M18-1.5 | 18.37 | 18.62 | 18.5 | 9 3/4 | 15 1/8 | 20 5/8 | 25 7/8 | 31 3/8 |
M20-1.5 | 20.37 | 20.62 | 20.5 | 10 3/8 | 16 1/8 | 22 | 28 7/8 | 35 |
美英制粗牙螺紋 | 最小 | 最大 | 鑽頭 | 1D | 1.5D | 2D | 2.5D | 3D |
U#4-40 | 2.95 | 3.07 | 3.0 | 2 3/4 | 4 3/4 | 6 3/4 | 8 7/8 | 10 7/8 |
U#5-40 | 3.25 | 3.38 | 3.3 | 3 1/4 | 5 1/2 | 7 3/4 | 10 | 12 1/4 |
U#6-32 | 3.66 | 3.81 | 3.7 | 2 3/4 | 4 3/4 | 6 7/8 | 8 7/8 | 10 7/8 |
U#8-32 | 4.32 | 4.47 | 4.4 | 3 1/2 | 6 | 8 3/8 | 10 3/4 | 13 1/4 |
U#10-24 | 5.05 | 5.21 | 5.1 | 2 7/8 | 5 | 7 1/8 | 9 1/4 | 11 3/4 |
U1/4-20 | 6.63 | 6.78 | 6.7 | 3 3/8 | 5 3/4 | 8 | 10 3/8 | 12 3/4 |
U5/16-18 | 8.33 | 8.48 | 8.4 | 4 | 6 5/8 | 9 1/4 | 11 7/8 | 14 5/8 |
U3/8-16 | 9.91 | 10.11 | 10.0 | 4 3/8 | 7 1/4 | 10 | 12 7/8 | 15 3/4 |
U7/16-14 | 11.51 | 11.76 | 11.6 | 4 1/2 | 7 3/8 | 10 1/4 | 13 1/8 | 16 1/8 |
U1/2-13 | 13.08 | 13.34 | 13.2 | 4 7/8 | 7 7/8 | 11 | 14 1/8 | 17 1/8 |
U9/16-12 | 14.68 | 14.94 | 14.8 | 5 1/8 | 8 1/4 | 11 1/2 | 14 3/4 | 17 7/8 |
U5/8-11 | 16.59 | 16.84 | 16.7 | 5 1/4 | 8 1/2 | 11 3/4 | 15 | 18 3/8 |
U3/4-10 | 19.84 | 20.09 | 20.0 | 5 7/8 | 9 3/8 | 13 | 16 1/2 | 20 1/8 |
U7/8-9 | 23.01 | 23.27 | 23.0 | 6 1/4 | 10 | 13 3/4 | 17 1/2 | 21 1/4 |
美英制細牙螺紋 | 最小 | 最大 | 鑽頭 | 1D | 1.5D | 2D | 2.5D | 3D |
U#8-36 | 4.32 | 4.44 | 4.4 | 3 7/8 | 6 1/2 | 9 1/8 | 11 5/8 | 14 1/4 |
U#10-32 | 4.98 | 5.13 | 5.0 | 4 1/8 | 6 7/8 | 9 1/2 | 12 1/4 | 14 7/8 |
U1/4-28 | 6.53 | 6.71 | 6.6 | 5 | 8 1/4 | 11 3/8 | 14 1/2 | 17 5/8 |
U5/16-24 | 8.20 | 8.38 | 8.3 | 5 1/2 | 8 7/8 | 12 1/4 | 15 5/8 | 19 |
U3/8-24 | 9.78 | 9.96 | 9.8 | 6 7/8 | 11 | 15 | 19 1/8 | 23 1/8 |
U7/16-20 | 11.43 | 11.63 | 11.5 | 6 5/8 | 10 5/8 | 14 5/8 | 18 1/2 | 22 1/2 |
U1/2-20 | 13.03 | 13.26 | 13.1 | 7 7/8 | 12 3/8 | 16 7/8 | 21 3/8 | 25 7/8 |
U5/8-18 | 16.26 | 16.48 | 16.3 | 9 | 14 1/8 | 19 1/4 | 24 1/4 | 29 3/8 |
U3/4-16 | 19.43 | 19.68 | 19.5 | 9 3/4 | 15 1/8 | 20 5/8 | 26 | 31 1/2 |
火星塞專用 | 最小 | 最大 | 鑽頭 | 7.7L | 10L | 15L | 20L | |
M14-1.25 | 14.27 | 14.40 | 14.30 | 4 5/8 | 6 1/2 | 9 3/4 | 13 1/8 |
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