JIS B 1186 – 2013 – Bu lông kết cấu
|
M12 | M16 | M20 | M22 | M24 | M27 | M30 | |
P | Pitch | 1.75 | 2 | 2.5 | 2.5 | 3 | 3 | 3.5 |
b | max | 30 | 35 | 41 | 46 | 51 | 56 | 61 |
min | 25 | 30 | 35 | 40 | 45 | 50 | 55 | |
ds | max | 12.7 | 16.7 | 20.8 | 22.8 | 24.8 | 27.8 | 30.8 |
min | 11.8 | 15.8 | 19.6 | 21.6 | 23.6 | 26.6 | 29.6 | |
k | max | 8.8 | 10.8 | 13.9 | 14.9 | 15.9 | 17.9 | 20 |
min | 7.2 | 9.2 | 12.1 | 13.1 | 14.1 | 16.1 | 18 | |
s | max | 22 | 27 | 32 | 36 | 41 | 46 | 50 |
min | 21.2 | 26.2 | 31 | 35 | 40 | 45 | 49 | |
e | Ref. | 25 | 31 | 36 | 41 | 47 | 53 | 57 |