DIN603-1981 圆头方颈螺栓标准
圆头方颈螺栓
执行标准：DIN603-1981
| 公称直径d | M5 | M6 | M8 | M10 | M12 | M16 | M20 | |
| 螺距p | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2.5 | |
| b | 1≤125 | 16 | 18 | 22 | 26 | 30 | 38 | 46 |
| 125<1≤200 | 22 | 24 | 28 | 32 | 36 | 44 | 52 | |
| 1>200 | / | / | 41 | 45 | 49 | 57 | 65 | |
| dk | max | 13.55 | 16.55 | 20.55 | 24.65 | 30.65 | 38.8 | 46.8 |
| min | 12.45 | 15.45 | 19.35 | 23.35 | 29.35 | 37.2 | 45.2 | |
| ds | max | 5 | 6 | 8 | 10 | 12 | 16 | 20 |
| min | 4.52 | 5.52 | 7.42 | 9.42 | 11.3 | 15.3 | 19.16 | |
| k | max | 3.3 | 3.88 | 4.88 | 5.38 | 6.95 | 8.95 | 11.05 |
| min | 2.7 | 3.12 | 4.12 | 4.62 | 6.05 | 8.05 | 9.95 | |