A fitting used with a union nut and thread piece to form a union.
NSN 5855-00-237-4088
NSN 5915-01-273-6741
NSN 5965-00-424-9636
NSN 6150-00-683-5349
NSN 5930-01-457-4062
NSN 5930-01-391-2080
NSN 6610-00-076-0342
NSN 6110-01-037-7368
NSN 2925-01-390-7963
NSN 6320-01-029-4220
NSN 5996-00-226-5364
NSN 4140-01-243-1281