3/8-16 x 4 Phillips Flat Machine Screw Type F Zinc Plated

3/8-16 x 4 Phillips Flat Machine Screw Type F Zinc Plated . Flat Head thread cutting screw with machine screw thread with blunt tapered point. having multi-cutting edges and chip cavities. For heavy gauge sheet metal. aluminum, zinc and lead die castings, cast Iron, brass and plastic.