H9 Self drilling roofing Screws Being an eminent organization in the industry, we are involved in trading a premium quality range of Zinc Plated Screw (Head Hex) Installation: SDS Screw are sharp threads draw material together and ensure a secure your needs for a pre-drilled hole. And The length of the drill point determines the material thickness of the Drilling hole Diameter upto 4 mm in M S Sheet Drill Hole & Forming mating thread Clamping at home can reliably penetrate. To Ensures correct whole size every time. Which resulting in better thread engagement and tighter clamp. And it�s important to consider. It only needs one tool for application screw drive Bit or 8mm (5/16�) Nut Socket Drive (Nutsteller) Or Screwdriver Bit with Magnetizer Ring for better results These self-drilling screws are highly versatile, so there is no pre-drilling required for these screws. Self-drilling screws can drill its own hole and tap its own thread as it is driven into the surface. Application: screw are used to attach metal profile sheets, fiber sheet, , fiberglass, Upvc frames, Aluminum Profiles, MS sheet, MS angle, MS pipe, metal to metal, wood to metal, fiber to metal can be used to attach. It is wood drill tail screw, mainly used in steel structure caigang watt fixed can also be used for fixing the simple construction of the sheet material Care Instructions: Wear Eye & Hand protection. Product details Type � Self Drilling Screw DIN 7504K 8mm (5/16�) Hex Head Trimed Color :- White Zinc Plated (Silver) Material :- Carbon steel (1022) Therad Sizes : 14 Tpi