Product Details

This product is a core fastener specifically designed for the main frame of steel structure engineering. It boasts an ultra-high strength grade of 10.9S and is manufactured strictly according to national standards GB1228-1231. It serves as a core connecting bolt for main load-bearing components such as steel columns, beams, and trusses. The product undergoes multiple processes including cold heading, heat treatment, thread rolling, flaw detection, and corrosion protection. Each batch undergoes tensile strength, hardness, and torque coefficient testing; substandard products are strictly prohibited from leaving the factory. The bolt head securely connects to the bolt shank, with burr-free and stripped threads. After installation, the load is evenly distributed, effectively resisting wind vibration, earthquakes, and vertical loads in high-rise buildings and large-span factory buildings, providing a core guarantee for the safety of steel structure engineering.

Core Technical Parameters

Material: 20MnTiB alloy steel
Strength Grade: 10.9 grade
Surface Treatment: Electro-galvanized, Hot-dip galvanized (optional)
Thread Specifications: M16, M20, M22, M24, M27, M30, M36 (Regular stock available, lengths can be customized)
Testing Standards: Tensile strength, yield strength, hardness, and thread precision all meet national/industry standards.

Core Application Scenarios:

Steel structure factory/warehouse beam and column pre-embedded connections; high-rise building steel structure main body pre-embedded fixing; bridge steel structure node welding and splicing; large stadium steel truss pre-embedded connections; heavy industrial equipment steel structure base fixing.

Compatible Standards & Recommended Matching Equipment

Execution Standards: National Standard GB/T 901, German Standard DIN975

Execution Standards: National Standard GB/T 901, German Standard DIN975

Recommended Matching Equipment: Grade 10 hexagonal nuts + Grade 8 flat washers + spring washers (Purchased as a set, no separate selection required during construction, better compatibility)