Product Details

This product is a standard Q195 carbon steel cotter pin, also known as a hairpin pin or whistle pin. It is a specialized accessory for preventing loosening of pins, bolts, and nuts, providing the final layer of protection for the secure fastening of steel structures. Made from high-quality Q195 carbon steel through multiple processes including stamping, bending, galvanizing for corrosion protection, and dimensional inspection, the product strictly adheres to national production standards. The pin body is smooth and burr-free, with symmetrical and uniform openings at both ends, and moderate elasticity. After insertion into the hole of the pin or bolt, simply pry open the openings at both ends to securely lock it in place, preventing the pin from falling out or the bolt from loosening, effectively improving the stability of steel structure connections. The product surface is electro-galvanized, providing excellent rust resistance. It is suitable for various indoor and outdoor steel structures, equipment hinges, and fastener loosening applications. Available in a full range of specifications, it offers strong adaptability. Each batch undergoes dimensional accuracy and elasticity testing, ensuring stable quality. It is an essential anti-loosening accessory for steel structures.

Core Technical Parameters

Material : Q195 high-quality carbon steel
Surface Treatment : Electro-galvanized
Specifications : Φ1 Φ2 Φ3 Φ4 Φ5 Φ6 Φ8 Φ10 (Regular stock available, lengths can be customized)
Testing Standards : Dimensional tolerances, elasticity, and surface smoothness all meet the requirements of national standard GB/T 91.

Core Application Scenarios

Pin anti-loosening locking, bolt tail anti-loosening fixing, steel structure hinge anti-loosening, equipment frame pin locking, guardrail connector anti-loosening, photovoltaic bracket pin matching.

Compatible Standards & Recommended Matching

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

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

Execution Standard: National Standard GB/T 91
Recommended Matching: Pins and bolts of the same specifications (best anti-loosening combination, one-stop complete solution)