Zinc plating provides corrosion resistance

7/8-9 x 4 Grade 5 Hex Cap Screw Plain Domestic USA (45)

these T25 #10 x 2 1/2 screws are corrosion resistant

5/8-11 x 2 1/2 Grade 8 Hex Cap Screw Yellow Zinc Plated Domestic USA (125)

1 3/4-5 A563 Grade A Heavy Hex Nut Plain

5/16 Extra Heavy Flat Washers Yellow Zinc CR+6 Domestic USA - Carton (5000) 1/4-28 Grade 5 Hex Cap Screws Plain - Domestic USA Zinc plating provides corrosion resistance5 16 Extra Heavy Flat Washers Yellow Zinc CR+6 Domestic USA Carton (5000) is engineered for extreme load distribution, these washers are substantially thicker than standard types, ideal for oversized or slotted holes and heavy machinery. The CR+6 plating offers maximum corrosion resistance and durability, favored in non RoHS industrial, defense, and specialized applications requiring the highest level of zinc chromate protection. Choose Domestic USA