The Alemite 50491 is a pin-type grease coupler with a 1/8-inch NPTF male thread. The pin-type design secures over standard pin-style grease fittings during equipment, automotive, and industrial lubrication tasks. The 1/8-inch NPTF male thread supports use with most grease gun hoses and extensions. Supplied individually for industrial, contractor, and MRO lubrication-equipment inventories.