NF E 25-801-3 – 2005 – Bu lông kết cấu
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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 | |
k | Nominal Size | 7.5 | 8.8 | 10 | 11.5 | 12.5 | 14 | 15 | 17 | 18.7 | 22.5 |
max | 7.95 | 9.25 | 10.75 | 12.4 | 13.4 | 14.9 | 15.9 | 17.9 | 19.75 | 23.55 | |
min | 7.05 | 8.35 | 9.25 | 10.6 | 11.6 | 13.1 | 14.1 | 15.1 | 17.65 | 21.45 | |
s | max | 22 | 24 | 27 | 30 | 32 | 36 | 41 | 46 | 50 | 60 |
min | 21.16 | 23.16 | 26.16 | 29.16 | 31 | 35 | 40 | 45 | 49 | 58.8 | |
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 |