A fitting used with a union nut and thread piece to form a union.
NSN 6650-00-815-1579
NSN 5998-00-585-3171
NSN 5895-00-694-9285
NSN 6105-01-290-4738
NSN 4140-01-623-4004
NSN 6650-00-162-0951
NSN 6650-01-291-3164
NSN 6110-01-156-4635
NSN 6150-01-306-7408
NSN 5835-01-123-8305
NSN 5930-01-102-1537
NSN 5910-01-529-3291