An item with internal machine threads designed to fit the external machine threads of a tube fitting. It has flat faces, one of which has a counterbored recess to accommodate packing, packing or sealing ring(s), gasket(s), and the like. The item, when installed, provides a method of locking and sealing the connection. See also locknut, pipe; nut (1), tube coupling and nut (1), plain, hexagon.
NSN 6110-01-399-6165
NSN 2925-00-105-3907
NSN 5985-01-077-2030
NSN 5990-01-517-7848
NSN 4140-01-154-5830
NSN 6130-01-218-5682
NSN 5905-01-442-7682
NSN 6685-00-834-0494
NSN 5999-01-095-5552
NSN 5895-00-248-2392
NSN 4140-01-031-0286
NSN 5915-01-102-1601