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 Pasterboard (50 pcs)

WAFER HEAD SCREWS: Carbon steel, coating - black phosphate, thread - coarse thread, tail - sharp tip, head - modified trellis, guide - Phillips PH2. USABILITY: Commonly used when building track and plasterboard ceilings, for sewing the most durable rail, optimized sharp tip geometry (no pre-drilling required) and Wafer Head designed for applications where large tightening is required. Multi-purpose screw used in a variety of applications. EASY TO INSTALL: You need a Phillips Phillips screwdriver (2PH bit), no need to pre-drill. The flat wafer head ensures strong connection and resistance to breaking the head, the fine wire provides maximum performance and high pull resistance. Sharp tip for easy penetration PHOSPHATE COATING: The black color of carbon steel screws is the result of phosphate coating, which is used to help prevent rust. Without the phosphate coating, wet drywall residues can cause the screw heads to rust. Screws are mainly used for interior projects. UNIVERSAL SCREW: Used for the construction of plasterboard, drywall, sheet metal, wood rails. Carbon steel screws perfect for construction, drywall, plaster wall, wood paneling, stairs and other indoor applications, decking and various wood joints.