A fitting used with a union nut and a tailpiece to form a union.
NSN 5998-00-234-8813
NSN 5935-01-169-5297
NSN 5905-00-681-1197
NSN 5990-00-288-1820
NSN 6135-01-350-2932
NSN 6650-00-479-9329
NSN 5999-00-369-1623
NSN 5999-00-439-0874
NSN 6240-01-084-3571
NSN 5910-01-095-9983
NSN 2925-01-609-8464
NSN 6105-01-549-0852