DEWALT Lok-Bolt AS Hex Nut Carbon Steel, 5/8" x 4-1/4" (Box of 10)

The Lokbolt Hex 5/8 X 4 1/4 (AS) is a medium-duty sleeve anchor designed for general-purpose fastening into concrete, brick, and block. Its expanding sleeve, made from zinc-plated carbon steel, grips the sides of the hole as the nut or screw is tightened, delivering reliable holding power for railings, fixtures, and light structural work.