5/8-11 x 6 Hex Cap Screw SS 316 (A4)

9/16-18 x 4 Hex Cap Screw SS 18-8 (A2)

7/8 x 12 High Speed Long Boy (1/2" Shank)

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6-32 x 3/16 Phillips Flat 82 Undercut Machine Screw Black Zinc Plated (10,000) LedgerLOK Ledger Board Fasteners 5/8-11 x 6 Hex Cap6 32 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.