This self-drilling zinc plated phillips wafer head screw w/wings drills a hole and taps a thread in a single operation. The drilling point must fully penetrate all pieces of metal before the first thread engages. Application: Attaches plywood to metal. Drill Capacity (in.): .035 - .176 Installation: A standard screw gun with torque limiting nose piece set at a maximum of 2500 RPM drive speed recommended. Use a #2 Phillips drive bit. Do not over torque as it can cause the head to snap or stripping of the recess. Installed fasteners must penetrate a minimum of three full threads beyond the metal structure. Specifications: • Meets ASTM1 C 1513 for cold-formed steel framing connections • Meets ASTM A 510 for carbon steel manufacturing • Manufactured to SAE2 J78 for dimensional specifications • Meets F.I.P.3-1000.7 for torsional strength and drill speed • Meets ASTM F1941 for corrosion resistance