GB /T 3632 – 1995 – Bu lông kết cấu
Screw Thread | M16 | M20 | (M22) | M24 | |
P | Pitch | 2 | 2.5 | 2.5 | 3 |
da | max | 18.83 | 24.4 | 26.4 | 28.4 |
dk | max | 30 | 37 | 41 | 44 |
k | max | 10.75 | 13.9 | 14.9 | 15.9 |
min | 9.25 | 12.1 | 13.1 | 14.1 | |
z | max | 17 | 19 | 21 | 23 |
dp | Nominal Size | 11.1 | 13.9 | 15.4 | 16.7 |
max | 11.3 | 14.1 | 15.6 | 16.9 | |
min | 11 | 13.8 | 15.3 | 16.6 | |
de | ≈ | 13 | 17 | 18 | 20 |
Weight of per 1000 steel products(≈kg) | – | – | – | – |