JSS II 09 (-1) – 1996 – Bu lông kết cấu
Screw Thread | M16 | M20 | M22 | M24 | M27 | M30 | |
ds | Nominal Size | 16 | 20 | 22 | 24 | 27 | 30 |
max | 16.7 | 20.8 | 22.8 | 24.8 | 27.8 | 30.8 | |
min | 16 | 19.6 | 21.6 | 23.6 | 26.6 | 29.6 | |
dc | min | 27 | 34 | 38.5 | 43 | 49 | 55 |
k | Nominal Size | 10 | 13 | 14 | 15 | 17 | 19 |
max | 10.8 | 13.9 | 14.9 | 15.9 | 17.9 | 20 | |
min | 9.2 | 12.1 | 13.1 | 14.1 | 16.1 | 18 | |
z | ≈ | 15 | 18 | 19 | 20 | 22 | 24 |
dp | Nominal Size | 11.3 | 14.1 | 15.4 | 16.8 | 19 | 21.1 |
max | 11.6 | 14.4 | 15.7 | 17.1 | 19.3 | 21.4 | |
min | 11 | 13.8 | 15.1 | 16.5 | 18.7 | 20.8 | |
r | ≈ | 1.2~2 | 1.2~2 | 1.2~2 | 1.6~2.4 | 1.6~2.4 | 2.0~2.8 |
b | min=nominal size | 30 | 36 | 40 | 45 | 50 | 55 |
max | 35 | 42 | 46 | 51 | 56 | 61 |