Product Details

This product is an essential accessory for steel structure bolts, available in flat washers and spring washers. Both are grade 8 high-strength washers, manufactured strictly according to German standards DIN125 (flat washers), DIN127 (spring washers), and Chinese standard GB93. Made of high-quality 65Mn spring steel, it combines elasticity and hardness after heat treatment. The core function of flat washers is to “distribute pressure.” Steel structure components are often made of thick steel plates, and directly tightening the bolt head can easily damage the steel plate surface and cause the bolt to loosen due to the small stress area. Flat washers effectively increase the stress surface, protecting the components while improving connection strength. The core function of spring washers is to “prevent loosening.” They are suitable for applications involving vibration, such as factory crane beams and equipment supports. Their elastic rebound can counteract loosening caused by vibration, making them a fundamental and essential component for steel structure connections.

Core Technical Parameters

Material: 65Mn spring steel
Strength Grade: Grade 8
Surface Treatment: Electro-galvanized/Hot-dip galvanized (optional)
Specifications: M8 M10 M12 M16 M20 M22 M24 (suitable for corresponding bolts)
Standards: DIN125 (flat washers), DIN127 (spring washers), GB93 (Chinese Standard)

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

Used with all bolts in steel structures. Flat washers are suitable for static load connections, while spring washers are suitable for vibration load connections. Applicable to factories, warehouses, high-rise buildings, and equipment supports.
Recommended Matching: Flat washers + spring washers provide better anti-loosening effect; high-strength bolts paired with flat washers + spring washers ensure more even stress distribution.