A fitting used with a union nut and thread piece to form a union.
NSN 6685-01-423-1464
NSN 5915-01-325-9426
NSN 5925-00-006-1305
NSN 5950-01-113-7631
NSN 5960-01-536-9763
NSN 5855-01-167-2162
NSN 6150-01-101-7323
NSN 5895-01-408-4985
NSN 5855-01-444-0588
NSN 5855-01-535-2266
NSN 5996-01-337-3516
NSN 5935-00-156-1182