A fitting used with a union nut and thread piece to form a union.
NSN 5855-00-189-6066
NSN 5855-01-105-7793
NSN 4140-01-513-0767
NSN 6650-01-032-1786
NSN 5930-01-357-8000
NSN 5935-01-439-2260
NSN 6240-01-331-5246
NSN 6240-00-548-3992
NSN 6320-00-894-1644
NSN 5975-01-243-0221
NSN 5925-01-038-4066
NSN 7035-00-490-0485