Product Details

This product is an essential accessory for 4.8 grade bolts. It’s a fundamental flat washer for steel structure auxiliary connections, manufactured to dual standards to suit domestic and international projects. Its 4-grade strength perfectly matches the 4.8 grade bolts. Its main function is to increase the stress-bearing area and protect the surface of lightweight components. Steel structure auxiliary components are mostly made of thin steel plates or lightweight profiles. Directly tightening the bolt head can easily damage the surface of the component, leading to deformation and bolt loosening. The 4-grade flat washer effectively distributes pressure, protecting the component and improving the connection’s strength, making it an essential item for steel structure auxiliary connections. The product boasts mature technology, stable quality, a complete range of in-stock specifications, and short delivery cycles, making it a basic inventory item for engineering companies and trading companies.

Core Technical Parameters

Material: Carbon steel Q235
Strength Grade: Grade 4
Surface Treatment: Electro-galvanized
Specifications: M6, M8, M10, M12, M16 (compatible with corresponding 4.8 grade bolts)
Standards: DIN125 (German Standard), GB97.1 (Chinese Standard)

Core Application Scenarios

Used with 4.8 grade bolts for connecting lightweight components such as steel structure accessories, guardrails, ladders, and door and window frames.
Recommended Matching: Use with 4.8 grade bolts and 4 grade nuts as a set for better results.