A fitting used with a union nut and thread piece to form a union.
NSN 6150-00-770-4576
NSN 5999-00-188-3018
NSN 5915-00-737-6207
NSN 6145-01-492-5642
NSN 2925-00-758-9931
NSN 5895-00-753-5349
NSN 5920-01-109-3117
NSN 6610-01-211-0835
NSN 6650-00-407-7059
NSN 6240-01-028-2971
NSN 5990-00-681-2789
NSN 5990-00-277-3763