4.2mm x 19mm Wafer Head Self Tapping Screw, Black Phosphate, Modified Truss Wood Screws, Carbon Steel Fine Thread Phillips Drive, Pozi Flanged for Sheet Metal and Plasterboard (50 pcs)

WAFER HEAD SCREWS: Carbon steel, Coating - Black Phosphate, Threads - Coarse thread, Tail - Sharp Pointed, Head - Modified Truss, Drive - Phillips PH2. USABILITY: Commonly used when constructing drywall track and ceiling, for stitching the track tougher, optimized sharp point geometry (no predrill neded) and Wafer Head designed for applications where a large clamping required. Multipurpose screw used in a variety of applications. EASY TO INSTALL: Phillips head screwdriver needed (bit 2PH), no need to predrill. Flat wafer head ensures a strong connection and resistance to head breakage, fine thread gives ultimate performance and high pull-out resistance. Sharp point for easy penetration. PHOSPHATE COATING: The black color of carbon Steel screws is a result of phosphate coating, which is used to help prevent rusting. Without the phosphate coating, wet residues from the drywall can cause the screw heads to rust. Screws are mostly used for indoor projects. UNIVERSAL SCREW: Used when constructing drywall track, plasterboard, metal sheets, wood. Carbon steel screws perfect for constructions, plasterboard, plaster walls, wood panels, stairs and other indoor applications, patios and various wood joints.