8 x 1 1/2 Simpson Truss-Head Wood Screws - Square Drive 305 SS - Box (100)

3/4-10 x 2 1/2 Hex Cap Screw SS 316 (A4)

2-4 1/2 x 16 Socket Cap Screw Alloy

13/32 x 18 High Speed Long Boy

1/4-20 x 3/8 Phillips Flat 82 Undercut Machine Screw Black Zinc Plated (6,000) Finished Hex Nuts 316 Stainless Steel 8 x 1 1/2 Simpson1 4 20 x 3 8 Phillips Flat 82 Undercut Machine Screw Black Zinc Plated (6,000) . 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.