5/8-11 x 6 1/2 Hex Cap Screw SS 18-8 (A2)

3/8 x 4 Mushroom Spike Zinc Plated (25)

4-40 x 1/4 Phillips Flat 82 Undercut Machine Screw Black Zinc Plated (10

1 5/32 x 6 Reduced Shank Drill Bit (1/2 Shank)

12-24 x 3/8 Phillips Flat 82 Undercut Machine Screw Black Zinc Plated (9

1/4-20 x 1/2 Phillips Flat 82 Undercut Machine Screw Black Zinc Plated (5,000) A194 2H Heavy Hex Nuts Hot Dipped Galvanized 5/8-11 x 6 1/2 Hex1 4 20 x 1 2 Phillips Flat 82 Undercut Machine Screw Black Zinc Plated (5,000) . Black Zinc is an acidic, low temperature powdered product developed to impart a black conversion coating of zinc die casting, galvanized stock and electroplated zinc parts. The black coating serves as a base for organic coatings (lacquers, paints, waxes and oils) and also provides an esthetic appeal.