Material is manufactured with rolled threads

5/8-11 x 12 A307 Grade A Carriage Bolt Zinc Plated

1-8 x 4 A307A Hex Tap Bolt Zinc Plated

1-14 x 3 Grade 8 Hex Cap Screw Yellow Zinc Plated

1-8 x 3 A307A Hex Tap Bolt Zinc Plated 5/8-11 Hex Cap Screws 316 Stainless Steel Material is manufactured with rolled1 8 x 3 A307A Hex Tap Bolt Zinc Plated. A307A Hex Tap Bolts are manufactured from low carbon steel. Our hex tap bolts meet our exceed ASTM A307 Grade A. All material is manufactured with rolled threads. Zinc plated material meets or exceeds ASTM F1941. Typical hardness will range from HRB 69 100 and tensile strength will meet a minimum 60,000 psi.