This Enerpac AR-400 3/4" NPTF (National Pipe Taper Fuel) threaded female half works with an AH-604 male half (sold separately) to create the A-604 complete coupler system for use with hand pumps in medium-duty applications. The maximum flow capacity is 462 cubic inches per minute, and the overall length is 2.53". An included dust cap protects the coupler against dust and debris when not in use.

Enerpac manufactures high-pressure tools and equipment for industrial applications. The company, founded in 1910, is headquartered in Menomonee Falls, WI.