The zinc plating provides a protective layer that enhances resistance against moisture

220 x 11 Simpson Strong-Drive® SDWS LOG Screw E-Coat - Box (250)

3/4-10 x 6 Grade 8 Hex Cap Screw Yellow Zinc Plated Domestic USA (10)

1-14 x 4 1/2 Grade 8 Hex Cap Screw Yellow Zinc Plated

2-4 1/2 A194 2H Heavy Hex Nut Hot Dipped Galvanized Phillips Pan-Head Marine Screws 316 Stainless Steel The zinc plating provides a2 4 1 2 A194 2H Heavy Hex Nut Hot Dipped Galvanized . A194 2H Heavy Hex Nuts are manufactured from 1045 steel to meet or exceed ASTM A194 Grade 2H. Hot Dip Galvanized material will meet or exceed ASTM A153 and or ASTM F2329. Galvanized nuts are over tapped per ASTM A563. Typical hardness is HRC 24 35 for diameters up to 1 1 2 inches, HRB 95 HRC 35 for diameters over 1 1 1 2 inches. Proof load strength is 175,000 psi.