18-8 stainless steel hex cap screws will have a typical composition of 18% chromium and 8% nickel

1-8 x 4 Grade 8 Hex Cap Screw Yellow Zinc Plated

1-8 x 10 Grade 5 Hex Cap Screw Zinc Plated

1/2-13 x 12 Grade 5 Hex Cap Screw Zinc Plated

3/4-10 x 14 (6" Thread) A307 Grade A Carriage Bolt Hot Dipped Galvanized 3/8 Hex Lag Screws 18-8 Stainless Steel 18-8 stainless steel hex cap3 4 10 x 14 A307 Grade A Carriage Bolt HDG . A307 Grade A Carriage Bolts are manufactured from low carbon steel to meet or exceed ASTM A307 Grade A. Material is manufactured with rolled threads. Lengths out to 6 inches will be fully threaded. Lengths over 6 to 12 inches will have 6 inches of thread. Zinc plated material will meet or exceed ASTM F1941. Hot Dip Galvanized material will meet or exceed ASTM A153. Typical hardness will range from HRB 69