4.2mm x 25mm Wafer Head Self Tapping Screw, Black Phosphate, Modified Truss Carbon Steel Screws, Fine Thread Phillips Drive, Pozi Flanged for Sheet Metal, Pasterboard and Wood (50 pcs)

WAFER HEAD SCREWS: carbon steel, coating - black phosphating, thread - coarse thread, tip - sharp-edged, head - modified truss rod, drive - Phillips PH2. Usability: commonly used when construction drywall track and ceiling, for sewing the track harder, optimized sharp tip geometry (no pre-drilling neded) and wafer head for applications where a large clamp is required. Multi-purpose screw used in a variety of applications. Easy installation: Phillips screwdriver required (bit 2PH), no pre-drilling required. Flat waffle head ensures a strong connection and resistance to breakage, fine thread ensures ultimate performance and high tear resistance. Sharp tip for easy penetration PHOSPHATE COATING: The black color of carbon steel screws is the result of the phosphate coating, which serves to prevent rust. Without the phosphate coating, damp residue from the drywall can cause the screw heads to rust. Screws are mostly used for indoor projects. Universal screw: used in the construction of drywall, plasterboard, metal panels and wood. Carbon steel screws perfect for constructions, plasterboard, plaster walls, wood panels, stairs and other interior applications, patios and various wood joints.