Screw hooks are single-piece hooked fasteners with a threaded shank designed to be driven into a prepared hole or tapped substrate to create a hanging point. The threaded portion engages mating threads or anchors to transfer load into the mounting material while the curved end captures cables, chains or fittings. Installation is typically by hand or with a spanner on the unthreaded shoulder to turn the shank into the substrate until the hook sits firm; the hook then carries tensile and shear loads in service. These components are commonly used in construction and maintenance for suspending items from timber or masonry where a simple, accessible connection is required, and the corrosion-resistant surface treatment helps prolong service life in ordinary indoor and sheltered outdoor applications.