3/4-16 x 7 1/2 Hex Cap Screw SS 18-8 (A2)

6-lobe drive prevents driver bit cam-out and stripping in recess

6 x 1 5/8 Phillips Bugle Decking Screws Yellow Zinc Plated - Carton (5000)

1 3/4-5 x 14 Socket Cap Screw Alloy

4-40 x 5/16 Phillips Flat 82 Undercut Machine Screw Black Zinc Plated (10,000) Nylon Insert Locknuts Zinc Plated 3/4-16 x 7 1/2 Hex4 40 x 5 16 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.