Product Details

This product is a national standard hexagonal self-drilling screw, also known as a dovetail screw. It is a special self-drilling and self-tapping screw for color steel tiles, steel structure roofs, and sheet metal. No pre-drilling is required; drilling and tightening are completed in one step. The product is made of high-quality carbon steel through multiple processes including cold heading, heat treatment hardening, precision thread rolling, galvanizing for corrosion protection, and edge grinding. The drill bit is sharp and hard, easily drilling through 0.5-3mm thick color steel tiles, sheet metal, and steel plates. The thread has a moderate coarseness and density, a tight fit, and good anti-loosening effect after tightening. The hexagonal head design is compatible with a collet wrench, making installation convenient and non-slip. The drill tip is burr-free and deformation-free. The surface is electro-galvanized/hot-dip galvanized for corrosion protection, providing excellent rust resistance. It is suitable for outdoor color steel tile factories, steel structure roofs, sheet metal fencing, light steel keel, and other applications. Each batch undergoes hardness, sharpness, and thread accuracy testing, ensuring stable quality. It is an essential fastener for steel structure roof installation.

Core Technical Parameters

Material: High-quality carbon steel
Surface Treatment: Electro-galvanized, hot-dip galvanized (optional)
Specifications: M4.8, M5.5, M6.3 (Regular stock available, lengths 19mm-75mm selectable)
Compatible Thickness: 0.5-3mm color steel roofing sheets/iron sheets/steel plates ### Core Application Scenarios: Color steel roofing fastening, iron sheet fencing installation and fixing, light steel keel splicing, thin steel plate connection for steel structures, prefabricated house frame fastening, photovoltaic color steel roofing sheet bracket fixing

Compatible Standards & Recommended Accessories

Execution Standard: National Standard GB/T 15856.4
Recommended Accessories: No additional accessories (self-drilling and self-tapping integrated, ready to use)