Specifications:
| Nominal Size | Thread Pitch (p) | Height of weld projection (h) | Width Across corners (e) | Width Across Flat (s) | |
| Min. | Min. | Min. | Max. | ||
| M4 | 0.70 | 0.50 | 0.70 | 9 | 7 |
| M5 | 0.80 | 0.70 | 0.90 | 12 | 9 |
| M6 | 1.00 | 0.70 | 0.90 | 13 | 10 |
| M8 | 1.25 | 0.90 | 1.10 | 18 | 14 |
| M10 | 1.25 | 1.10 | 1.30 | 22 | 17 |
| M10* | 1.50 | 1.10 | 1.30 | 22 | 19 |
