9/16-12 x 8 Socket Cap Screw Alloy

5/8-11 x 9 Grade 5 Hex Cap Screw Zinc Plated

21/64 Heavy Duty Jobber Drill Bit

1/4 x 1 1/2 Mushroom Spike Zinc Plated (100)

1 3/8-12 x 5 1/2 Socket Cap Screw Alloy

12-24 x 1/2 Phillips Flat 82 Undercut Machine Screw Black Zinc Plated (7,000) Phillips Flat Undercut Machine Screws Black Zinc Plated 9/16-12 x 8 Socket Cap12 24 x 1 2 Phillips Flat 82 Undercut Machine Screw Black Zinc Plated (7,000) . 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.