Heavy-Duty Structural Hex Bolts
Heavy hex structural bolts (GB/T1228, Grade 8.8S / 10.9S) are high-tensile friction-type fasteners for steel frame buildings, bridges and steel engineering.Unlike regular hex bolts, the heavy hex head provides a larger bearing surface, which distributes clamping force evenly and supports high tensile and shear loads. This is why heavy hex structural bolts are widely specified in critical steel joints that must resist static load, dynamic vibration and long-term fatigue.Our heavy hex structural bolts are manufactured strictly to GB/T1228 standard, the Chinese standard for steel structure large hexagon bolts.Our heavy hex structural bolts cover a full metric size range from M16 to M30, with various thread lengths.
Surface Finishes for Different Environments
Black Oxide (Black Finish)：Cost-effective for indoor dry steel workshops, no extra corrosion protection.
Hot-dip Galvanized：Excellent anti-rust performance, ideal for outdoor bridges, coastal steel structures and humid open-air projects.
Dacromet / Geomet Coating：For projects requiring anti-corrosion while avoiding hydrogen embrittlement risk.
Electro galvanized finish is also available for light corrosion scenarios upon request.
Common Applications of Heavy Hex Structural Bolts
Prefabricated steel structure workshops and warehouse frames
Highway bridges, railway bridges and pedestrian steel bridges
High-rise steel frame buildings and commercial steel construction
Power towers, substation steel supports and solar bracket steel frames
Container frames, heavy equipment steel bases and industrial platforms
They are widely purchased by steel structure contractors, engineering firms, steel fabricators and construction companies.
A complete assembly normally includes one heavy hex bolt, one matched nut and two flat washers, ready for direct installation on steel beams, columns and steel trusses.If you need quotation, datasheet or sample of heavy hex structural bolts, send us your specifications today. We will reply quickly with competitive wholesale price and supporting documents.
Post time: 2026-10-27 15:00:53
