Color Zinc Plated Pan Head Self-Drilling Screw With Washer (Phillips Wafer Flange Head Self-Drilling Screw)

1. Applicable fields and product standards

The product is produced in accordance with GB/T15856.2 Chinese national standard and comes with a washer flange plate, which increases the pressure area when tightening and prevents slipping and loosening. It is widely used in light steel keels, color steel sheet linings, electrical appliance sheet metal, door and window accessories, iron shelves, and guardrail thin panel assembly. It is exported to Southeast Asia, the Middle East, Africa and other overseas hardware and building materials markets all year round. The tip of the drill point has its own cutting edge, which eliminates the need for pre-drilling and can directly drill through 2~5mm thin steel sheets. It is a universal fastening accessory for indoor light steel structures.

2. Raw materials and production technology

High-quality carbon steel is selected, and the overall quenching heat treatment is adopted. The drill point has strong hardness, and the drilling is sharp and difficult to chip at the tip and break at the drill point. Production process: Ten processes including rough drawing of raw materials, annealing, phosphating, fine drawing, cold heading, point forming, thread rolling, heat treatment processing, zinc plating, and packaging. The head anti-skid tooth washer and screw are integrated to prevent the extruded workpiece from slipping during assembly. The thread pitch is uniform and standard, and the screwed-in steel sheet engages tightly, and the teeth are resistant to loosening and fall off after long-term vibration. The color zinc plated coating is dense and thick.

3. Product core advantages

Integrated washer anti-slip structure: A circle of anti-slip serrations on the bottom of the flange bites into the surface of the board after tightening, effectively preventing the screws from turning loose, eliminating the need to install a separate flat washer, and shortening construction time.

Self-drilling without pre-drilling: the tip drill point completes drilling, tapping, and locking in one go. It is suitable for zinc plated plates, cold-rolled iron sheets, and plastic steel profiles, and the installation efficiency of thin panels is greatly improved.

4. Quality control warehousing and supporting services

The full range of specifications are always in stock, regular orders are dispatched within 48 hours, and sample orders and full-container export orders can be accepted. The drill point hardness, anti-slip serration shape, thread accuracy, and coating adhesion are randomly inspected before leaving the factory, and defective products with chipped tips, missing teeth, and defective coatings are eliminated. It can be supplied in complete sets with the factory's hexagonal drill point and countersunk head drill point, and one-stop fasteners; it supports customized nonstandard lengthening and special tooth type self-drilling screws, and stable production capacity ensures long-term replenishment for overseas customers.