Flat Round Head Weld Bolts
JIS B 1195 - 2009
Display drawing:
| Screw Thread | M4 | M5 | M6 | M8 | M10 | M12 | ||
| D | 4 | 5 | 6 | 8 | 10 | 12 | ||
| P | Coarse Thread | 0.7 | 0.8 | 1 | 1.25 | 1.5 | 1.75 | |
| P | Fine Thread | None | None | None | 1 | 1.25 | 1.25 | |
| Dk | Nominal | 10 | 12 | 14 | 18 | 22 | 26 | |
| Dk | Max | 10.4 | 12.4 | 14.4 | 18.4 | 22.4 | 26.4 | |
| Dk | Min | 9.6 | 11.6 | 13.6 | 17.6 | 21.6 | 25.6 | |
| K | Nominal | 1.3 | 1.8 | 2 | 2.5 | 3.5 | 4.5 | |
| K | Max | 1.5 | 2 | 2.2 | 2.7 | 3.7 | 4.7 | |
| K | Min | 1.1 | 1.6 | 1.8 | 2.3 | 3.3 | 4.3 | |
| D1 | Nominal | 1.5 | 2 | 2.5 | 3 | 4 | 4 | |
| D1 | Max | 1.75 | 2.25 | 2.75 | 3.25 | 4.25 | 4.25 | |
| D1 | Min | 1.25 | 1.75 | 2.25 | 2.75 | 3.75 | 3.75 | |
| H | Nominal | 0.7 | 0.7 | 0.8 | 0.8 | 1 | 1 | |
| H | Max | 0.8 | 0.8 | 0.9 | 0.9 | 1.1 | 1.1 | |
| H | Min | 0.6 | 0.6 | 0.7 | 0.7 | 0.9 | 0.9 | |