Black Phosphated Winged Countersunk Head Self-Drilling Screw

1. Applicable fields and product positioning

This product is a Phillips countersunk head self-drilling screw with limiting clip ears. After the countersunk head structure is completed, the screw head is embedded in the plate, and the surface is smooth and has no bulges. The clamping ear limit structure can control the drilling depth and avoid drilling through thin panels. It is mostly used in the assembly of light steel keels, interior iron sheets, furniture hardware, and thin steel sheets for doors and windows. It is widely used in interior decoration and mechanical and electrical equipment assembly. It comes with a drill point and eliminates the need for drilling. It also takes into account the fastening of steel sheets and wooden base materials. It is popular in the hardware and building materials markets of many countries.

2. Material Selection and Production Process

Using high-quality carbon steel, the drill is sharp and resistant to chipping. Production process: rough drawing of raw materials, annealing, phosphating, fine drawing, cold heading, point forming, thread rolling, point forming, heat treatment, heat treatment, zinc plating, washer assembly and packaging. The limit lugs are formed in one piece and will automatically limit when drilling to a specified depth; the Phillips recess bites smoothly and the bit is not easy to slip when working; the black phosphated surface is matte and less oily, which will not contaminate the paint surface of the board, making the indoor assembly cleaner.

3. Product core advantages

Limit clamp lugs to prevent over-drilling: limit lugs on both sides of the shaft, which limit the drilling when it is in place, effectively preventing drilling through thin iron sheets and gypsum boards, and reducing the construction scrap rate.

Hidden installation of countersunk head: The tapered countersunk head sinks completely into the base material after being locked. The panel surface is flat and the appearance of the ceiling and interior decoration is better.

4. Quality control warehousing and supporting services

The full range of specifications are always in stock, with fast delivery within 48 hours. Samples and entire export orders can be accepted. The drill point hardness, clip lug molding dimensions, thread and phosphated quality are randomly inspected before leaving the factory, and defective products are eliminated. It can be used with conventional countersunk head drill point and self-tapping screw complete set of shipments, providing one-stop fastening accessories; it supports customized special lengthened specifications according to incoming samples, and stable production capacity ensures long-term supply.