Hex Bolts for Steel Structures

1.Complies with ASTM A325/A490, DIN 6914, DIN 7990,GB/T 1231; structural specialized hex bolts

2.Material: Medium carbon/alloy steel, quenched & tempered; strength grades 4.8–12.9

3.Structure: Hex head + threaded shank (full/half thread), paired with high-strength nuts/washers

4.Surface treatments: Hot-dip galvanizing, electroplating

5.Size M12–M64, length 30–150mm (for thick steel plates)

Core features of Hex Bolts for Steel Structures

1.Hex head: Stable high-torque transmission, easy heavy-duty installation
2.High strength: Excellent tensile/shear resistance, adapts to structural dynamic/static loads
3.Anti-fatigue/anti-loosening: Precision threads + heat treatment, resists vibration
4.Force distribution: Matches washers to reduce stress concentration on steel
Corrosion-resistant: Suitable for outdoor/industrial harsh environments

Product Parameter (Specification)

Standard	DIN,ASTM/ANSI, JIS, EN, ISO,AS	Material	Carbon steel，Alloy steel, Stainless Steel
Surface Treatment	Zinc Plated, Hop Dip Galvanized(HDG) phosphorization, Black Oxide, Geomet,Dacroment, Nickel plated, Zinc-Nickel plated	Shank	Full thread, Half thread
Grade	4.8, 5.6, 6.8,8.8, 10.9, 12.9	Size	M12-M64
Unite	Piece	Packing	Bulk cartons with pallet, small boxes in cartons with pallet

Product Application

Hex Bolts for Steel Structures is widely used in heavy Industry, mining, water treatment, healthcare, construction, general industry, Oil & Gas, automotive industry etc.

Hex Bolts for Steel Structures Application Scenario Comparison Table

Application Scenario	Recommended Material Grade	Recommended Surface Treatment
Building steel structures (beam-column joints and truss splicing in industrial plants, high-rise buildings, and large venues)	Grade 8.8 , Grade 5.6	Hot-Dip Galvanizing (HDG, for outdoor use), Phosphating (for indoor dry environments)
Mechanical manufacturing (base fixing of heavy machinery, machine tools, and mining equipment; flange docking of transmission systems)	Grade 8.8 , Grade 4.8/5.6	Black Oxide (for indoor dry environments), Phosphating + Anti-Rust Oil (for oil-mist-prone environments)
Transportation infrastructure (highway/railway bridge joints, highway guardrails, track supports for rail transit)	Grade 8.8	Hot-Dip Galvanizing (HDG, resistant to rainwater and salt spray)
Outdoor & corrosive environments (port machinery, offshore platform auxiliary structures, power transmission towers)	Grade 8.8	Hot-dip galvanizing (HDG), phosphating + painting (suitable for high salt spray environments)
Industrial equipment and piping (installation of pipe flanges in the chemical/power industry; boiler accessories)	Grade 8.8 (suitable for environments ≤200℃)	Phosphating treatment + high-temperature resistant coating (suitable for high-temperature environments), hot-dip galvanizing (suitable for normal temperature and humid pipelines).

Hex Bolts for Steel Structures

Hex Bolts for Steel Structures Application Scenario Comparison Table

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