| 公制牙距 | 英制牙距 |
| 规格 | 牙 距 | 规格 | 称呼 | 牙 数 | ||||||
| 粗牙 | 细牙 | 极细牙 | 粗牙 | 细牙 | 韦氏牙 | |||||
| M3 | 0.5 | 0.35 | 4# | 2.9 | 40 | 48 | ||||
| M4 | 0.7 | 0.5 | 6# | 3.5 | 32 | 40 | ||||
| M5 | 0.8 | 0.5 | 8# | 4.2 | 32 | 36 | ||||
| M6 | 1.0 | 0.75 | 10# | 4.8 | 24 | 32 | ||||
| M7 | 1.0 | 0.75 | 12# | 5.5 | 24 | 28 | ||||
| M8 | 1.25 | 1.0 | 0.75 | 1/4 | 6.35 | 20 | 28 | 20 | ||
| M10 | 1.5 | 1.25 | 1.0 | 5/16 | 7.94 | 18 | 24 | 18 | ||
| M12 | 1.75 | 1.5 | 1.25 | 3/8 | 9.53 | 16 | 24 | 16 | ||
| M14 | 2.0 | 1.5 | 1.0 | 7/16 | 11.11 | 14 | 20 | 14 | ||
| M16 | 2.0 | 1.5 | 1.0 | 1/2 | 12.7 | 13 | 20 | 12 | ||
| M18 | 2.5 | 2.0 | 1.5 | 9/16 | 14.29 | 12 | 18 | 12 | ||
| M20 | 2.5 | 2.0 | 1.5 | 5/8 | 15.86 | 11 | 18 | 11 | ||
| M22 | 2.5 | 2.0 | 1.5 | 3/4 | 19.05 | 10 | 16 | 10 | ||
| M24 | 3.0 | 2.0 | 1.5 | 7/8 | 22.23 | 9 | 14 | 9 | ||
| M27 | 3.0 | 2.0 | 1.5 | 1 | 25.40 | 8 | 12 | 8 | ||
| M30 | 3.5 | 3.0 | 2.0 | |||||||
