Torsional Shear Type High Strength Bolt

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Torsional Shear Type High Strength Bolt Dimensions of High Strength Hex Bolt for GB/T1228 Steel Structure
Torsional Shear Type High Strength Bolt Dimensions of High Strength Hex Bolt for GB/T1228 Steel Structure

The high strength bolt is mainly designed to connect steel structural panels together. It is characterized by single use and permanent connection. By construction crafts, it falls into torsional shear type and large hexagon type. This product is improved from large hexagon type. Our torsional shear type high strength bolt is composed of main bolt body, nut and washer. Its tensile strength comes in 1040 ~ 1240 MPa and 830 ~ 1030 MPa. This product has the yield strength of 940 MPa or 660 MPa. In addition, our product has a long service life, ideally suitable for railway, highway, bridge, boiler, factory, high-rise buildings, hoisting machinery as well as other steel structures.

Mechanical Properties
Performance Rate Tensile Strength Yield Strength (σ0.2) Elongation Rate(δ5) Shrinkage Rate (Ψ)
σь Mpa % %
Mpa min
10.9S 1040~ 1240 940 10 42
8.8S 830~ 1030 660 12 45
Tensile Load
Thread Standards (d) M16 M20 M22 M24 M27 M30
Stress Areas (mm2) 157 245 303 353 459 561
Tensile Load (KN) 10.9S 163~ 195 255~ 304 315~ 376 367~ 438 477~ 569 583~ 696
8.8S 130~ 162 203~ 252 251~ 312 293~ 364 381~ 473 466~ 578
Thread Standards
Thread Standards (d) M16 M20 M22 M24 M27 M30
Thread Pitch (p) 2 2.5 2.5 3 3 3.5
da Max. 18.83 24.4 26.4 28.4 32.84 35.84
ds Max. 16.43 20.52 22.52 24.52 27.84 30.84
Min. 15.57 19.48 21.48 23.48 26.16 29.16
dw Min. 27.9 34.5 38.5 41.5 42.8 46.5
dk Max. 30 37 41 44 50 55
k, Nominal Value 10 13 14 15 17 19
Max. 10.75 13.9 14.9 15.9 17.9 20.05
Min. 9.25 12.1 13.1 14.1 16.1 17.95
k' Min. 12 14 15 16 17 18
k" Max. 17 19 21 23 24 25
r Min. 1.2 1.2 1.2 1.6 2 2
db Max. 11.3 14.1 15.6 16.9 19.3 21.4
Min. 11 13.8 15.3 16.6 18.7 20.8
dc ≈ 12.8 16.1 17.8 19.3 21.9 24.4
de ≈ 13 17 18 20 22 24
Raw Material of Components
Components Performance Rate Thread Standards Raw Material
Main Bolt Body 10.9S M12~ M24 20MnTiB
M27~ M30 35VB
8.8S M12~ M16 35#
M20~ M24 20MnTiB
M27~ M30 35VB
Nut 8H 10H M12~ M30 35#
Washer 35~ 45 HRC 12~ 30 45#
Chemical Composition
Composition C% Si% Mn% Ti% V% B% P% S%
20MnTiB 0.17~ 0.24 0.17~ 0.37 1.30~ 1.60 0.04~ 0.10   0.0005~ 0.0035 ≤0.035 ≤0.035
35VB 0.31~ 0.37 0.17~ 0.37 0.50~ 0.90   0.05~ 0.12 0.001~ 0.004 ≤0.04 ≤0.04
35# 0.32~ 0.40 0.17~ 0.37 0.50~ 0.80       ≤0.035 ≤0.035
45# 0.42~ 0.50 0.17~ 0.37 0.50~ 0.80       ≤0.035 ≤0.035

As a China-based torsional shear type high strength bolt manufacturer and supplier, SBS also offers truss steel structure building, galvanized bolt, sandwich panel assembled type container house, square tube, and much more.

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