1000/400/500 Series MIL-C-4109 Industrial Interchange Air Quick Disconnect, Female Half, -06 Coupling, 3/8-18 Female NPT

For a 3/8-18 female NPT port, this coupling matches that thread and it is the female half (socket) in an industrial interchange style that meets MIL-C-4109 dimensional requirements. It’s a -06 size with an NPTF threaded end and a push-to-connect style on the coupling side.

Common uses include general pneumatics, construction, industrial plants, and fluid transfer applications.

MIL-C-4109 is a military-spec dimensional standard that covers industrial interchange quick disconnects, so this female half will mate with any male plug built to the same spec, regardless of brand. That includes most common 1000, 400, and 500 series industrial interchange plugs you'd find in a typical plant or shop environment. The 3/8-18 female NPT port threads onto standard pipe fittings, so getting it integrated into an existing air line setup is usually straightforward.