A fitting used with a union nut and thread piece to form a union.
NSN 6620-00-248-9513
NSN 6610-01-222-7593
NSN 6610-00-171-5015
NSN 5998-01-415-3841
NSN 5925-01-030-5645
NSN 6220-01-641-3738
NSN 6610-01-520-6889
NSN 6130-01-505-9572
NSN 5985-01-052-1273
NSN 4140-01-455-7312
NSN 6135-00-643-4843
NSN 5975-00-322-7598