The 39-01-4032 is a 3-way 1-row Mini-Fit Jr.? Male Plug Housing made of nylon. It mates with 39-01-4030 receptacle housing. The panel mount crimp housing is suitable for power, wire-to-board and wire-to-wire applications. This 5559 series plug housing can be used with 5558 Mini-Fit? male crimp terminals and 30490 Mini-Fit? male grounding crimp terminals.