The anchor is set by driving the expansion plug towards the bottom of the anchor using the setting tool

13/32 x 18 High Speed Long Boy

3/4 Drop-in Anchor Setting Tool

This combination of features makes the 2-4 1/2 Grade 2 finished hex nut zinc plated an excellent choice for reliable fastening needs

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

1/4-20 x 3/8 Phillips Flat 82 Undercut Machine Screw Black Zinc Plated (6,000) Finished Hex Nuts 316 Stainless Steel The anchor is set by1 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.