The Hammer Drive Anchor is a fastening system which consists of two parts: (1) a nylon piece similar in design to a blind rivet which has a cylindrical shank split on two sides, 180° apart, extending from the bottom of the shank up most of the distance to the head. The shank has several ribs extending completely around its circumference. Mushroom, pan and flat head styles are available; (2) a steel pin expander which passes through a concentric channel extending from an opening in the top of the head of the nylon piece down into the shank to a point just below the spot where the split ends below the head. The pin has a slot across the top of its head, a chiseled point similar to a nail, and threads on its own shank which helps to lock the anchor in place upon installation.
Installation is achieved by inserting the end of the nylon shank into a pre-drilled hole and hammering the head of the nail until it meets the head of the anchor body. Driving the nail through the body expands the split ends which allows the ribs to grip the wall of the prepared hole. This is a light duty anchor for use in solid materials such as concrete, brick and block, preferred when fixtures must be attached without chipping the fixture or the masonry. Can also be used like a toggle bolt in wallboard or plaster, or as a blind rivet in joining several thicknesses of material together, especially in applications subject to vibration. The nylon withstands temperatures from -40° F to 170° F.