H9 410 Stainless Steel Round Head Philips Self Drilling Screws for Home & Industrial Use Ensures correct hole size every time, resulting in better thread engagement and tighter clamp Drilling hole upto 4 mm in M S Sheet Drill Hole & Forming mating thread Clamping at home can achieve in an easy operation. It only needs one tool for application screw drive & Screwdriver Bit with Magnetic Ring Adpoter. These self-drilling screws are highly versatile and are used to attach to metal, wood, fiberglass and plastic. The sharp threads draw material together and ensure a secure hold. 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: profile sheets, fiber sheet, MS sheet, MS angle, MS pipe, MS pipe, metal to metal, wood to metal, fiber to metal. Specifications: Type: - Self Drilling Screw Drive Style: - Phillips (PH2) Head Shape: - Wafer Truss Head Material: - SS410 Grade Stainless Steel Color: Silver tone Size:- #8 (4.2mm) x 13mm (1/2�) Features: 410 stainless steel has high strength and hardness ratings and resists corrosion in mild environments 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. Tek self-tapping screws provide secure fastening with strong holding power without the need to pre-drill. Modified Truss head is extra wide with a low-profile dome and integral round washer, Phillips driver designed to prevent over-tightening. Specification Item: flat/washer head self-drilling screw