DIN18182 Black Phosphate Drywall Screws Manufacturer 25mm 32mm 40mm Self-Drilling Drywall Screw Tornillos for Metal

DIN18182 Black Phosphate Drywall Screws Manufacturer 25mm 32mm 40mm Self-Drilling Drywall Screw Tornillos for Metal. Carbon Steel C1022A Material: Made of high-strength C1022A carbon steel for enhanced durability and strength. Multiple Surface Treatments: Available in Black Phosphate, Gray Phosphate, Galvanized, Nickel Plating, and more. Customizable Sizes: Diameter from 3.5mm to 5.5mm and length from 13mm to 150mm as requested. Versatile Thread Types: Offers Fine Thread, Coarse Thread, and Unique Twin-lead Thread options. Drill Point Design: Self-drilling capability for connecting gypsum board to metal keel up to 2.3mm. Bugle Head Style: Prevents tearing through outer paper layer and ensures secure fastening. OEM and ODM Services: Full customization available for size, packing, and surface treatment. High Production Capacity: Annual production of 5,000 tons with 150 sets of production equipment.