DIN981 圆螺母标准
圆螺母
执行标准：DIN981
| 螺纹规格 D x P | dk | m | n | t |
| M12×1 | 22 | 4 | 3 | 2 |
| M15×l | 25 | 5 | 4 | 2 |
| M17×1 | 28 | 5 | 4 | 2 |
| M20×l | 32 | 6 | 4 | 2 |
| M25×1.5 | 38 | 7 | 5 | 2 |
| M30×1.5 | 45 | 7 | 5 | 2 |
| M35×1.5 | 52 | 8 | 5 | 2 |
| M40×1.5 | 58 | 9 | 6 | 2.5 |
| M45×1.5 | 65 | 10 | 6 | 2.5 |
| M50×1.5 | 70 | 11 | 6 | 2.5 |
| M55×2 | 75 | 11 | 7 | 3 |
圆螺母
执行标准：DIN981
| 螺纹规格 D x P | dk | m | n | t |
| M12×1 | 22 | 4 | 3 | 2 |
| M15×l | 25 | 5 | 4 | 2 |
| M17×1 | 28 | 5 | 4 | 2 |
| M20×l | 32 | 6 | 4 | 2 |
| M25×1.5 | 38 | 7 | 5 | 2 |
| M30×1.5 | 45 | 7 | 5 | 2 |
| M35×1.5 | 52 | 8 | 5 | 2 |
| M40×1.5 | 58 | 9 | 6 | 2.5 |
| M45×1.5 | 65 | 10 | 6 | 2.5 |
| M50×1.5 | 70 | 11 | 6 | 2.5 |
| M55×2 | 75 | 11 | 7 | 3 |