Hexagon Bolt for Steel Framed Building
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The hexagon bolt is a standard part, also called hexbolt, hex cap screw, hex head cap screw, etc. In construction, it is subject to the initial tightening and final tightening. This threaded fastener is generally used for permanent connection. When applied to steel works, the hexagon bolt is used to connect the joints of steel plates.
GB/T1228 Hexagon Bolt for Steel StructuresSizes
Thread | M12 | M16 | M20 | M22 | M24 | M27 | M30 | ||||||||
Pitch | 1.75 | 2 | 2.5 | 2.5 | 3 | 3 | 3.5 | ||||||||
c | max | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | |||||||
min | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | ||||||||
da | max | 15.23 | 19.23 | 24.32 | 26.32 | 28.32 | 32.84 | 35.84 | |||||||
ds | max | 12.43 | 16.43 | 20.52 | 22.52 | 24.52 | 27.84 | 30.4 | |||||||
min | 11.57 | 15.57 | 19.48 | 21.48 | 23.48 | 26.16 | 29.16 | ||||||||
dw | min | 19.2 | 24.9 | 31.4 | 33.3 | 38 | 42.8 | 46.5 | |||||||
e | min | 22.78 | 59.56 | 37.29 | 39.55 | 45.2 | 50.85 | 55.37 | |||||||
k | nominal | 7.5 | 10 | 12.5 | 14 | 15 | 17 | 18.7 | |||||||
max | 7.95 | 10.75 | 13.4 | 14.9 | 15.9 | 17.9 | 19.75 | ||||||||
min | 7.05 | 9.25 | 11.6 | 13.1 | 14.1 | 16.1 | 17.65 | ||||||||
r | min | 1 | 1 | 1.5 | 1.5 | 1.5 | 2 | 2 | |||||||
s | max | 21 | 27 | 34 | 36 | 41 | 46 | 50 | |||||||
min | 20.16 | 26.16 | 33 | 35 | 40 | 45 | 49 | ||||||||
b | L nominal | <45 | ≥45 | <55 | ≥55 | <65 | ≥65 | <70 | ≥70 | <75 | ≥75 | <80 | ≥80 | <85 | ≥85 |
nominal | 25 | 30 | 30 | 35 | 35 | 40 | 40 | 45 | 45 | 50 | 50 | 55 | 55 | 60 |
Yield Strength σ0.2 | Elongation δ5 | Shrinkage Ψ |
Mpa | % | % |
min | ||
940 | 10 | 42 |
660 | 12 | 45 |
Thread | M12 | M16 | M20 | M22 | M24 | M27 | M30 | |
Stress Area(mm2) | 84.3 | 157 | 245 | 303 | 353 | 459 | 561 | |
Tensile Load (KN) | 10.9S | 87.7 - 104.5 | 163 - 195 | 255 - 304 | 315 - 376 | 367 - 438 | 477 - 569 | 583 - 696 |
8.8S | 70.0 - 86.8 | 130 - 162 | 203 - 252 | 251 - 312 | 293 - 364 | 381 - 473 | 466 - 578 |
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