Drop-in Anchors for Concrete
Concrete drop-in anchors consist of a zinc or stainless steel tubular expansion shield and a solid, conical-shaped expansion plug. The expansion plug is case-hardened and tempered to prevent galling and binding during expansion. The tubular shield has four equally spaced slots rising from the bottom to 1/4 or 1/2 of the tube length. As the expansion bolt is fastened into the tube, the expansion plug expands into the wall of the hole in the concrete.
Concrete drop-in anchor tubes have a smooth, flangeless top that allows for flush or countersunk intallation. The bottom lip of the shield is tapered to allow maximum depth and holding power.