A fitting used with a union nut and thread piece to form a union.
NSN 5990-01-457-7786
NSN 5935-01-529-1982
NSN 5895-01-377-3479
NSN 6130-00-926-7864
NSN 5998-00-780-0947
NSN 5905-01-147-5328
NSN 6110-01-011-4643
NSN 4140-00-470-0530
NSN 5895-01-421-2380
NSN 5915-01-594-3616
NSN 5910-00-784-5881
NSN 5950-01-645-2081