Coarse Thread Black Phosphate Drywall Screws with Bugle Head

Coarse Thread Black Phosphate Drywall Screws with Bugle Head. Strictly produced according to DIN7982 standard with precise dimension control. Bugle head effectively prevents drywall surface from cracking when fastening. Sharp cone point realizes fast penetration without pre-drilling holes. Optional coarse and fine threads suit wood stud and light steel keel respectively. Premium C1022 carbon steel features high tensile strength to avoid breaking. Multiple surface finishes: black oxide, black phosphate and zinc plated for rust resistance. Phillips drive matches manual screwdrivers and electric drills for easy installation. Full size range from M2.2 to M6.3 meets diverse construction fixing demands. Custom size and surface treatment available to support OEM & ODM orders. Stable quality with strict inspection, free standard samples offered for quality verification.