Delrin AF (Acetal Fluoropolymer) is used for low-friction, wear-resistant parts needing strength and dimensional stability, commonly found in mechanical systems (gears, bearings, bushings, cams, conveyors), fluid handling (pumps, valves, water softeners), electrical components (switches, counter frames, insulators), and environmental/transportation (marine fittings, fuel senders, HVAC blowers), often replacing metal for quieter, lubricant-free operation in demanding applications like food processing and submarines.