All material is manufactured with rolled threads

7/16-14 x 1 1/2 Hex Tap Bolt 18-8 (A2) Stainless Steel

3/4-16 x 5 1/2 Grade 8 Hex Cap Screw Yellow Zinc Plated

1/2-13 x 3 1/2 Hex Cap Screw SS 316 (A4)

1/4-20 x 4 Phillips Flat Machine Screw Type F Zinc Plated Phillips Self Drilling Drywall Screws Zinc Plated All material is manufactured with1 4 20 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.