NF E 25-504 – 1998 (R2004) – Bu lông long đen
Screw Thread | M5 | M6 | M8 | M10 | M12 | M14 | M16 | |
P | Pitch | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 |
b | L≤125 | 16 | 18 | 22 | 26 | 30 | 34 | 38 |
125<L≤200 | / | / | 28 | 32 | 36 | 40 | 44 | |
L>200 | / | / | / | / | / | / | 57 | |
dc | max | 11.4 | 13.6 | 17 | 20.8 | 24.7 | 28.6 | 32.8 |
k | max | 5.6 | 6.9 | 8.5 | 9.7 | 12.1 | 12.9 | 15.2 |
s | max | 7 | 8 | 10 | 13 | 15 | 18 | 21 |
min | 6.78 | 7.78 | 9.78 | 12.73 | 15.73 | 17.73 | 20.67 | |
ds | max | 5 | 6 | 8 | 10 | 12 | 14 | 16 |
min | 4.82 | 5.82 | 7.78 | 9.78 | 11.73 | 13.73 | 15.73 |