The high strength

1 3/4-5 x 20 Socket Cap Screw Alloy

3/4-10 x 8 A307 Grade A Carriage Bolt HDG

1/2-20 x 6 Hex Cap Screw SS 316 (A4)

5/8-11 x 7 1/2 Hex Cap Screw SS 316 (A4)

10-32 x 3/8 Phillips Flat 82 Undercut Machine Screw Black Zinc Plated (10,000) 1-14 Socket Cap Screws Alloy The high strength10 32 x 3 8 Phillips Flat 82 Undercut Machine Screw Black Zinc Plated (10,000) . 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.