A fitting used with a union nut and thread piece to form a union.
NSN 5925-01-379-2346
NSN 2925-01-423-8141
NSN 4140-01-061-0440
NSN 6610-01-027-1641
NSN 6650-01-077-2340
NSN 6610-00-451-8840
NSN 6610-01-506-0044
NSN 6240-00-079-0112
NSN 5950-01-443-5074
NSN 6610-00-983-4482
NSN 5999-01-206-4523
NSN 6320-01-512-2031