Steel UNC and UNF set screws are used to secure, lock and position shafts, hubs, gears, pulleys and other machine components where imperial threads are required. UNC features a coarse thread pitch for general-purpose applications, while UNF has a finer thread pitch that provides greater thread engagement per unit length and allows more controlled tightening. The range includes several point styles to suit different applications. Flat point screws minimize surface marking, cone point screws provide maximum holding power by penetrating the mating surface, dog point screws provide positive positioning in pre-drilled holes or slots, and cup point screws concentrate the clamping force onto a smaller contact area for a secure grip. This category includes steel UNC and UNF set screws manufactured according to ANSI B18.3 and ANSI B18.6.2 for machinery, maintenance, power transmission systems and industrial equipment using imperial threaded components.