the threads and nylon form a tight

deformation controlled expansion anchors with a pre-assembled expander plug

9/16-12 x 2 1/2 Hex Cap Screw SS 316 (A4)

1-14 Finished Hex Nut SS 18-8 (A2)

3/8 x 18 High Speed Long Boy

2-56 x 3/16 Phillips Flat 82 Undercut Machine Screw Black Zinc Plated (10,000) Hanger Bolt Drivers the threads and nylon form2 56 x 3 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.