DEWALT Lok-Bolt AS Combo Flat Head 304 Stainless Steel, 3/8" x 4" (Box of 50)

The Lokbolt SS FH 3/8 X 4 (AS) is a medium-duty sleeve anchor designed for general-purpose fastening into concrete, brick, and block. Its expanding sleeve, made from stainless 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.