TIMCO Window Fabrication Screws Pan PH Self-Tapping Self-Drilling Point Martensitic Stainless Steel & Silver Organic - 4.2 x 25

Generally used for attaching steel hardware to steel reinforced PVCu sections. The flat underside of the screws head allows it to clamp the materials together firmly. Stainless steel should be used where there is a corrosive environment.