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| 公制細(xì)螺紋 | 美制細(xì)螺紋 | ||||||
| 規(guī)格 | 標(biāo)準(zhǔn)徑 | 2級牙鉆孔徑 | 規(guī)格（UNC） | 標(biāo)準(zhǔn)徑 | 2級牙鉆孔徑 | ||
| 最大 | 最小 | 最大 | 最小 | ||||
| M1.0×0.2 | 0.80 | 0.821 | 0.783 | NO.0-80(1.524) | 1.25 | 1.305 | 1.182 |
| M1.1×0.2 | 0.90 | 0.921 | 0.883 | NO.1-72(1.854) | 1.55 | 1.612 | 1.474 |
| M1.2×0.2 | 1.00 | 1.021 | 0.983 | NO.2-64(2.184) | 1.85 | 1.912 | 1.756 |
| M1.4×0.2 | 1.20 | 1.221 | 1.183 | NO.3-56(2.515) | 2.10 | 2.197 | 2.025 |
| M1.6×0.2 | 1.40 | 1.421 | 1.383 | NO.4-48(2.845) | 2.40 | 2.458 | 2.271 |
| M1.7×0.2 | 1.45 | 1.500 | 1.460 | NO.5-44(3.175) | 2.70 | 2.740 | 2.551 |
| M1.8×0.2 | 1.60 | 1.621 | 1.583 | NO.6-40(3.505) | 2.90 | 3.022 | 2.820 |
| M2.0×0.25 | 1.75 | 1.785 | 1.729 | NO.8-36(4.166) | 3.50 | 3.606 | 3.404 |
| M2.2×0.25 | 1.95 | 1.985 | 1.929 | NO.10-32(4.826) | 4.10 | 4.165 | 3.963 |
| M2.3×0.25 | 2.05 | 2.061 | 2.001 | NO.12-28(5.846) | 4.60 | 4.724 | 4.496 |
| M2.5×0.35 | 2.20 | 2.221 | 2.121 | 1/4-28 | 5.50 | 5.588 | 5.360 |
| M2.6×0.35 | 2.20 | 2.246 | 2.186 | 5/16-24 | 6.90 | 7.035 | 6.782 |
| M3.0×0.35 | 2.70 | 2.721 | 2.621 | 3/8-24 | 8.50 | 8.636 | 8.382 |
| M3.5×0.35 | 3.20 | 3.221 | 3.121 | 7/16-20 | 9.90 | 10.033 | 9.729 |
| M4.0×0.5 | 3.50 | 3.599 | 3.459 | 1/2-20 | 11.50 | 11.607 | 11.329 |
| M4.5×0.5 | 4.00 | 4.099 | 3.959 | 9/16-18 | 12.90 | 13.081 | 12.751 |
| M5.0×0.5 | 4.50 | 4.599 | 4.459 | 5/8-18 | 14.50 | 14.681 | 14.351 |
| M5.5×0.5 | 5.00 | 5.099 | 4.959 | 3/4-16 | 17.50 | 17.678 | 17.323 |
| M6.0×0.75 | 5.30 | 5.378 | 5.188 | 7/8-14 | 20.50 | 20.675 | 20.270 |
| M6.0×0.5 | 5.50 | 5.550 | 5.400 | 1-12 | 23.20 | 23.571 | 23.114 |
| M7.0×0.75 | 6.30 | 6.378 | 6.188 | 1-1/8-12 | 26.50 | 26.746 | 26.289 |
| M7.0×0.5 | 6.50 | 6.550 | 6.400 | 1-1/4-12 | 29.50 | 29.921 | 29.464 |
| M8.0×1.0 | 7.00 | 7.153 | 6.917 | 1-3/8-12 | 32.80 | 33.096 | 32.639 |
| M8.0×0.75 | 7.30 | 7.378 | 7.188 | 1-1/2-12 | 36.00 | 36.271 | 35.814 |
| M8.0×0.5 | 7.50 | 7.520 | 7.400 | ||||
| M9.0×1.0 | 8.00 | 8.153 | 7.917 | ||||
| M9.0×0.75 | 8.30 | 8.378 | 8.188 | ||||
| M10×1.25 | 8.80 | 8.912 | 8.647 | ||||
| M10×1.0 | 9.00 | 9.153 | 8.917 | ||||
| M10×0.75 | 9.30 | 9.378 | 9.188 | ||||
| M10×0.5 | 9.50 | 9.520 | 9.400 | ||||
| M11×1.0 | 10.00 | 10.153 | 9.917 | ||||
| M11×0.75 | 10.30 | 10.378 | 10.188 | ||||
| M12×1.5 | 10.50 | 10.676 | 10.376 | ||||
| M12×1.25 | 10.80 | 10.912 | 10.647 | ||||
| M12×1.0 | 11.00 | 11.153 | 10.917 | ||||
| M12×0.5 | 11.50 | 11.520 | 11.400 | ||||
| M14×1.5 | 12.50 | 12.676 | 12.376 | ||||
| M14×1.0 | 13.00 | 13.153 | 12.917 | ||||
| M15×1.5 | 13.50 | 13.676 | 13.376 | ||||
| M15×1.0 | 14.00 | 14.153 | 13.917 | ||||
| M16×1.5 | 14.50 | 14.676 | 14.376 | ||||
| M16×1.0 | 15.00 | 15.153 | 14.917 | ||||
| M17×1.5 | 15.50 | 15.676 | 15.376 | ||||
| M17×1.0 | 16.00 | 16.153 | 15.917 | ||||
| M18×2.0 | 16.00 | 16.210 | 15.835 | ||||
| M18×1.5 | 16.50 | 16.676 | 16.376 | ||||
| M18×1.0 | 17.00 | 17.153 | 16.917 | ||||
| M20×2.0 | 18.00 | 18.210 | 17.835 | ||||
| M20×1.5 | 18.50 | 18.676 | 18.376 | ||||
| M20×1.0 | 19.00 | 19.153 | 18.917 | ||||
| M22×2.0 | 20.00 | 20.210 | 19.835 | ||||
| M22×1.5 | 20.50 | 20.676 | 20.376 | ||||
| M22×1.0 | 21.00 | 21.153 | 20.917 | ||||
| M24×2.0 | 22.00 | 22.210 | 21.835 | ||||
| M24×1.5 | 22.50 | 22.676 | 22.376 | ||||
| M24×1.0 | 23.00 | 23.153 | 22.917 | ||||
| M25×2.0 | 23.00 | 23.210 | 22.835 | ||||
| M25×1.5 | 23.50 | 23.676 | 23.376 | ||||
| M25×1.0 | 24.00 | 24.153 | 23.917 | ||||
| M26×1.5 | 24.50 | 24.676 | 24.376 | ||||
| M27×2.0 | 25.00 | 25.210 | 24.835 | ||||
| M27×1.5 | 25.50 | 25.676 | 25.376 | ||||
| M27×1.0 | 26.00 | 26.153 | 25.917 | ||||
| M28×2.0 | 26.00 | 26.210 | 25.835 | ||||
| M28×1.5 | 26.50 | 26.676 | 26.376 | ||||
| M28×1.0 | 27.00 | 27.153 | 26.917 | ||||
| M30×3.0 | 27.00 | 27.252 | 26.752 | ||||
| M30×2.0 | 28.00 | 28.210 | 27.835 | ||||
| M30×1.5 | 28.50 | 28.676 | 28.376 | ||||
| M30×1.0 | 29.00 | 29.153 | 28.917 | ||||
| M32×2.0 | 30.00 | 30.210 | 29.835 | ||||
| M32×1.5 | 30.50 | 30.676 | 30.376 | ||||
| M33×3.0 | 30.00 | 30.252 | 29.752 | ||||
| M33×2.0 | 31.00 | 31.210 | 30.835 | ||||
| M33×1.5 | 31.50 | 31.676 | 31.376 | ||||
| M35×1.5 | 33.50 | 33.676 | 33.376 | ||||
| M36×3.0 | 33.00 | 33.252 | 32.752 | ||||
| M36×2.0 | 34.00 | 34.210 | 33.835 | ||||
| M36×1.5 | 34.50 | 34.676 | 34.376 | ||||