A masonry screw (often known by the brand name Tapcon) is a specialized threaded fastener used to secure objects directly into concrete, brick, or block.

Unlike traditional anchors that require a separate plastic plug or an expansion mechanism, a masonry screw has a hardened, self-tapping thread that cuts a thread directly into the pre-drilled pilot hole as it is driven in.

This allows for a quick and easy installation, providing a strong, secure, and permanent hold without the need for a separate anchor. They are widely used for installing brackets, electrical boxes, shutters, and other fixtures to masonry surfaces.