1 7/16 x 6 Reduced Shank Drill Bit (1/2 Shank)

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

#36 Heavy Duty Drill Bit - Stubby Length

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

1 3/8 Flat Washer SS 18-8 (A2)

1/4-20 x 3/4 Phillips Flat 82 Undercut Machine Screw Black Zinc Plated (4,000) 7/16-14 Socket Cap Screws Alloy 1 7/16 x 6 Reduced1 4 20 x 3 4 Phillips Flat 82 Undercut Machine Screw Black Zinc Plated (4,000) . 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.