JIS B 1182 – 1995 – Bu lông đầu vuông
Screw Thread | M6 | M8 | M10 | M12 | (M14) | M16 | (M18) | M20 | (M22) | M24 | |
P | Pitch | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 | 2.5 | 2.5 | 2.5 | 3 |
ds | max=nominal size | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 22 | 24 |
min | 5.8 | 7.8 | 9.8 | 11.75 | 13.75 | 15.75 | 17.75 | 19.65 | 21.65 | 23.65 | |
k | Nominal Size | 4 | 5.5 | 7 | 8 | 9 | 10 | 12 | 13 | 14 | 15 |
max | 4.25 | 5.75 | 7.3 | 8.3 | 9.3 | 10.35 | 12.35 | 13.35 | 14.35 | 15.35 | |
min | 3.75 | 5.25 | 6.7 | 7.7 | 8.7 | 9.65 | 11.65 | 12.65 | 13.65 | 14.65 | |
s | max=nominal size | 10 | 13 | 17 | 19 | 22 | 24 | 27 | 30 | 32 | 36 |
min | 9.4 | 12.3 | 16.3 | 18.2 | 21.2 | 23.2 | 26.2 | 29.2 | 31 | 35 |