Phillips Countersunk Head Self Tapping Screw From Fasteners Factory China High Efficiency Construction Fastener

This self-drilling screw features an integrated hardened drill tip that removes the need for pre-drilling pilot holes. Installers can finish drilling, tapping and fastening in a single motion, drastic

Designed with standard 90-degree countersunk flat head and Phillips cross drive. After tightening, the entire head is hidden inside the material surface to form a smooth flat plane, perfectly meeting

Multiple stainless steel grades are optional to match different usage demands. 410 stainless steel has ultra-high surface hardness for smooth drilling on thick metal sheets; 304 stainless steel provid

The full-length threads are precision cold-rolled with uniform pitch and deep tooth depth. When penetrating materials, the threads form tight meshing locking force, which can effectively offset vibrat

Every screw goes through multiple polishing and deburring procedures. The surface is bright and smooth without sharp edges or metal burrs, which avoids scratching the workpiece coating and operators