Countersunk Self-Drilling Screws Suppliers in China - Leading Companies
Aozhan countersunk self-drilling screws merge flush-mount aesthetics with self-drilling functionality - the 90° conical heads sit perfectly flat while the specialized drill points penetrate metals without pre-drilling. Manufactured from heat-treated alloy steel with zinc/Dacromet coatings (GB/T 15856.1 compliant), these screws are ideal for elevator cars, electrical cabinets and decorative projects where both appearance and installation efficiency are priorities.
