GB /T 35 – 1988 – Bu lông đầu vuông
Screw Thread | M5 | M6 | M8 | M10 | M12 | (M14) | M16 | (M18) | |
P | Pitch | 0.8 | 1 | 1.25 | 1.50 | 1.75 | 2.0 | 2.0 | 2.5 |
b | L≤125 | 16 | 18 | 22 | 26 | 30 | 34 | 38 | 42 |
125<L≤200 | / | / | 28 | 32 | 36 | 40 | 44 | 48 | |
200<L | / | / | / | / | / | / | 57 | 61 | |
e | min | 9.93 | 12.53 | 16.34 | 20.24 | 22.84 | 26.21 | 30.11 | 34.01 |
k | Nominal Size | 3.5 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
min | 3.26 | 3.76 | 4.76 | 5.76 | 6.71 | 7.71 | 8.71 | 9.71 | |
max | 3.74 | 4.24 | 5.24 | 6.24 | 7.29 | 8.29 | 9.29 | 10.29 | |
s | max | 8 | 10 | 13 | 16 | 18 | 21 | 24 | 27 |
min | 7.64 | 9.64 | 12.57 | 15.57 | 17.57 | 20.16 | 23.16 | 26.16 | |
Weight of per 1000 steel products(≈kg) | – | – | – | – | – | – | – | – |
Screw Thread | M20 | (M22) | M24 | (M27) | M30 | M36 | M42 | M48 | |
P | Pitch | 2.5 | 2.5 | 3 | 3 | 4 | 4 | 5 | 5 |
b | L≤125 | 46 | 50 | 54 | 60 | 66 | 78 | / | / |
125<L≤200 | 52 | 56 | 60 | 66 | 72 | 84 | 96 | 108 | |
200<L | 65 | 69 | 73 | 79 | 85 | 97 | 109 | 121 | |
e | min | 37.91 | 42.9 | 45.5 | 52 | 58.5 | 69.94 | 82.03 | 95.05 |
k | Nominal Size | 11 | 12 | 13 | 15 | 17 | 20 | 23 | 26 |
min | 10.65 | 11.65 | 12.65 | 14.65 | 16.65 | 19.58 | 22.58 | 25.58 | |
max | 11.35 | 12.35 | 13.35 | 15.35 | 17.35 | 20.42 | 23.42 | 26.42 | |
s | max | 30 | 34 | 36 | 41 | 46 | 55 | 65 | 75 |
min | 29.16 | 33 | 35 | 40 | 45 | 53.5 | 63.1 | 73.1 | |
Weight of per 1000 steel products(≈kg) | – | – | – | – | – | – | – | – |