Hexagon socket cheese head Self Tapping Screw , Stainless steel 304 , 60 degree tapping threads and sharp point , pre-drilling on the surface of part before put screw into material . Specification : 5.5x50 Installation tool : Hex wrench Depth for pre-drilling : 0.5-1.0 mm Material : SUS A4-70 Finish : Clear oil Other available material : Stainless steel A4 and Aluminum . Stainless steel product feature 1. More high tensile strength than carbon steel 2. Environmental protection 3. More longevity service 4. Bright surface , suitable for ornamental parts 5. Not easy to rust and corrode . |