A fitting used with a union nut and thread piece to form a union.
NSN 5920-01-185-2222
NSN 6620-01-443-8431
NSN 5965-00-862-2417
NSN 5950-01-233-1962
NSN 6130-01-563-5439
NSN 5965-00-810-2204
NSN 5920-00-136-4823
NSN 5930-01-231-3700
NSN 6130-00-728-9621
NSN 6620-01-548-9993
NSN 5998-01-634-0604
NSN 5905-01-250-3807