there is no secondary tightening operation required which greatly reduces the overall cost of an anchor installation

3/4-10 x 8 1/2 Hex Cap Screw SS 18-8 (A2)

1 1/2-6 x 12 Socket Cap Screw Alloy

3/8-16 x 6 Flat Sleeve Anchor Zinc Plated (50)

12-24 x 3/4 Phillips Flat 82 Undercut Machine Screw Black Zinc Plated (5,000) 1 1/8-7 Socket Cap Screws Alloy there is no secondary tightening12 24 x 3 4 Phillips Flat 82 Undercut Machine Screw Black Zinc Plated (5,000) . 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.