Confast's Concrete Machine Screw Anchor
Confast’s female-type concrete machine screw anchor is designed for anchoring into concrete, brick or block and have internal machine screw threads. It is designed for light- to medium-duty fastening purposes and is made from Zamac, a rust-resistant, zinc-based alloy. It is available in 3/16- (#10), 1/4-, 5/16-, 3/8-, 1/2-, 5/8- and 3/4-in. diameters.