A fitting used with a union nut and thread piece to form a union.
NSN 6610-01-156-0810
NSN 6650-00-337-7464
NSN 6650-01-056-7971
NSN 5996-01-097-9320
NSN 6610-01-196-6388
NSN 5999-00-081-6082
NSN 5985-01-443-4121
NSN 5920-00-311-3953
NSN 5975-01-456-4415
NSN 5945-01-441-9281
NSN 6220-01-377-7701
NSN 6105-00-615-9979