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 : 10.9S
Surface Treatment : Electro-galvanized/Hot-dip galvanized (optional)
Thread Specifications : M16, M20, M22, M24, M27, M30 (Regular stock available)
Testing Standards : Tensile strength, yield strength, torque coefficient, and hardness all meet national standards.

Core Application Scenarios

Steel structure factory/warehouse main frame steel column and beam connection; super high-rise building steel structure main structure connection; bridge steel structure main node connection; large stadium/airport terminal steel structure load-bearing connection

Compatibility Standards & Recommended Matching Components

Execution Standards : GB1228-1231 (Chinese National Standard), DIN6914 (German Standard)
Recommended Matching Components:
Grade 10 hexagonal nuts + Grade 8 flat washers + steel structure ingot washers (Complete set purchase, preferred for engineering projects, no need for separate selection)

Supply Information + After-Sales Guarantee

Custom Engineering: Supports non-standard specifications/length customization, produced according to drawings, customization cycle 20-25 days, no minimum order quantity.
Trade Procurement: Sufficient stock of standard specifications, minimum order quantity 50 pieces, in-stock items ship within 48 hours, bulk orders deliver in 7-15 days, bulk purchases enjoy tiered discounts.
After-Sales Guarantee: Provides material certificates and test reports, third-party testing can be provided for projects upon request.