Countersunk Head Self-Tapping Screw

1. Applicable fields and Chinese national standard basis

This product is produced in strict compliance with the GB/T846-1985 national standard. It has a tapered countersunk head Phillips recess structure. After locking, the screw head sinks completely into the base material, leaving the panel surface flat and without bulges. The products mainly focus on wooden boards, density boards, gypsum boards, and plastic parts, which are widely used in home decoration ceilings, furniture assembly, door and window interiors, and small household appliances assembly. They are exported in batches to overseas building materials and furniture markets such as Southeast Asia, the Middle East, and Africa all year round. Before use, small holes need to be pre-drilled in advance, and full threads are screwed into the base material for fastening.

2. Raw materials and production technology

The raw material is made of high-quality carbon steel, and the production process is: raw material rough drawing, annealing, phosphating, fine drawing, cold heading, thread rolling, heat treatment, processing, zinc plating, and packaging. The Phillips recess is neatly formed and suitable for standard Phillips bits. It is not easy to slip and recess damage during installation; the thread profile is sharp and uniform, and the thread is stable when screwed into the wood, making it difficult to split wood and slip. The blue-white zinc plated coating is dense and uniform.

3. Product core advantages

Concealed installation of countersunk head: The tapered countersunk head design allows the screw head surface to be completely embedded in the board after tightening. The surface of the workpiece is smooth and smooth without bulges. It is preferred for furniture, interior decoration, and ceiling projects.

Universal adaptability to multiple base materials: It can fasten solid wood, particle board, density board, PVC plastic, ultra-thin cold-rolled iron sheet, and is universal in home decoration, carpentry, and light industry assembly scenarios.

4. Quality control warehousing and supporting services

All Chinese national standard specifications are in stock, regular orders are dispatched within 48 hours, and small-batch samples and full-container export orders can be accepted. Before leaving the factory, thread accuracy and coating adhesion are inspected one by one according to Chinese national standards, and defective products such as chipped heads, incomplete threads, and poor coatings are removed. It can be packaged in complete sets with our factory's flat washer and spring washer, and is equipped with fastening accessories in one stop; it supports extended, special pitch self-tapping screws according to drawings or samples customized nonstandard, and stable mass production ensures the long-term replenishment needs of overseas buyers.