EN 14399 (-7) – 2007 – Bu lông kết cấu
Screw Thread | M12 | (M14) | M16 | (M18) | M20 | M22 | M24 | M27 | M30 | M36 | |
P | Pitch | 1.75 | 2 | 2 | 2.5 | 2.5 | 2.5 | 3 | 3 | 3.5 | 4 |
b | L≤125 | 30 | 34 | 38 | 42 | 46 | 50 | 54 | 60 | 66 | 78 |
125<L≤200 | / | 40 | 44 | 48 | 52 | 56 | 60 | 66 | 72 | 84 | |
200<L | / | / | / | / | 65 | 69 | 73 | 79 | 85 | 97 | |
ds | max | 12.7 | 14.7 | 16.7 | 18.7 | 20.84 | 22.84 | 24.84 | 27.84 | 30.84 | 37 |
min | 11.3 | 13.3 | 15.3 | 17.3 | 19.16 | 21.16 | 23.16 | 26.16 | 29.16 | 35 | |
dk | max | 24 | 28 | 32 | 36 | 40 | 44 | 48 | 54 | 60 | 72 |
min | 23.16 | 27.16 | 31.16 | 35 | 39 | 43 | 47 | 53 | 58.8 | 70.8 | |
M | min | 16.5 | 19.5 | 22.5 | 25.5 | 28.5 | 30.5 | 33.5 | 37.5 | 42.5 | 50.5 |
max | 15.5 | 18.5 | 21.5 | 24.5 | 27.5 | 29.5 | 32.5 | 36.5 | 41.5 | 49.5 | |
k | max | 8.75 | 9.75 | 10.75 | 12.9 | 13.9 | 14.9 | 16.9 | 18.4 | 20.55 | 24.05 |
min | 7.25 | 8.25 | 9.25 | 11.1 | 12.1 | 13.1 | 15.1 | 16.6 | 18.45 | 21.95 | |
n | max | 3 | 3 | 3 | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 | 4 | 4 |
min | 2.5 | 2.5 | 2.5 | 3 | 3 | 3 | 3 | 3 | 3.5 | 3.5 | |
t | max | 4.5 | 4.5 | 4.5 | 5 | 5 | 5 | 5 | 5 | 5.5 | 5.5 |
min | 3 | 3 | 3 | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 | 4 | 4 |