Product Details

This product is a national standard drywall screw, available in phosphate gray and black surface treatments. It is a specialized countersunk self-tapping screw for splicing light steel keel, gypsum board, wall panels, and timber. Made from high-quality carbon steel through multiple processes including cold heading, heat treatment hardening, precision thread rolling, surface treatment, and Phillips head countersunk groove machining. The countersunk head Phillips head has a precise shape, fine and uniform threads, and clear, burr-free teeth. The countersunk design allows the screw to fully embed into the surface of the board, resulting in a flat, non-protruding surface after tightening, without affecting subsequent decoration. The phosphate gray version is rust-proof and wear-resistant, suitable for indoor light steel keel and gypsum board installation; the black version has higher hardness and is suitable for splicing timber and light steel keel. The screw has excellent self-tapping performance, requiring no pre-drilling, and can be directly driven into light steel keel and timber, providing a tight, non-loosening engagement. Each batch undergoes hardness and thread precision testing, ensuring stable quality. It is an essential screw for decoration and light steel structure assembly.

Core Technical Parameters

Material: High-quality carbon steel
Surface Treatment: Phosphate gray, black anodizing (optional)
Specifications: M3.5 (length 16mm-50mm, standard stock)
Suitable Scenarios: Light steel keel, gypsum board, timber, wall panel splicing.

Core Application Scenarios

Light steel keel gypsum board ceiling fixing, interior wall panel splicing installation, timber and light steel keel connection, ceiling fastening, steel structure lightweight decorative component fixing, prefabricated house wall panel installation.

Compatible Standards & Recommended Accessories

Execution Standard: National Standard GB/T 14210
Recommended Accessories: No additional accessories (direct self-tapping, Phillips screwdriver sufficient for installation)