A fitting used with a union nut and a tailpiece to form a union.
NSN 6620-00-060-0549
NSN 5996-00-857-9810
NSN 5998-00-877-9506
NSN 5895-01-341-9212
NSN 5910-01-508-4674
NSN 6610-00-500-6944
NSN 6220-01-656-8658
NSN 6135-00-764-8680
NSN 6130-01-042-9526
NSN 6685-00-078-9793
NSN 4140-01-333-9434
NSN 5996-00-907-0012