A fitting used with a union nut and thread piece to form a union.
NSN 6685-01-451-7001
NSN 5975-00-160-6543
NSN 5855-01-052-3678
NSN 6650-01-333-6641
NSN 5998-01-537-6659
NSN 6145-01-623-3763
NSN 5999-01-221-8579
NSN 6620-01-348-8256
NSN 6135-01-142-6456
NSN 5975-01-092-1075
NSN 5990-01-417-4402
NSN 5975-01-534-7598