Phillips Pan Head Self-Drilling And Self-Tapping Screw (Chinese National Standard GB/T15856.1-2002)

2. Raw materials and production processes

Using high-quality carbon steel, the thin steel sheet is not easy to break when drilling. Production process: raw material rough drawing – annealing, phosphating, fine drawing, cold heading forming, tail point forming, screw thread rolling, heat treatment modulation processing, surface zinc plating treatment, packaging. The rounded pan head will not bulge and scratch the paint surface of the workpiece after assembly; the thread profile is even and full, and the locking thin panel is not easy to slip and crack; the blue-white zinc plated coating is dense and uniform.

3. Product core advantages

The arc pan head does not damage the workpiece: the round pan head has a smooth pan head, and the disk surface fits the panel surface after locking. There are no sharp edges and corners, and it will not scratch the surface coating of plastic and sheet metal. It is preferred for the interior assembly of home appliances.

Chinese national standard full range of specifications: a full range of Chinese national standard sizes, corresponding to cold-rolled steel sheets and zinc plated plates of various thicknesses from 2 to 6mm, meeting the assembly needs of multiple categories of thin panels in one stop.

Flexible options for multiple coatings: the standard blue-white zinc plated is cost-effective and can be used indoors; the color zinc plated is more resistant to salt spray and can be used in semi-open-air equipment; the black oxide version is low-cost and can be used for concealed assembly inside the equipment.

4. Quality control warehousing and supporting services

All Chinese national standard specifications are in stock. Regular orders are dispatched within 48 hours. Small-batch samples and full-container export orders can be accepted. Before leaving the factory, the pan head size, Phillips recess strength, drill point hardness, and coating adhesion are randomly inspected according to Chinese national standards, and defective products with chipped grooves, broken tips, and defective coatings are eliminated. It can be used with countersunk head drill point, hexagonal drill point, and various self-tapping screw complete sets of shipments; it supports customized nonstandard lengthened specifications for incoming samples, and stable production capacity and long-term supply.