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 6110-00-228-1744
NSN 5965-01-461-7195
NSN 6685-00-080-2110
NSN 5945-00-479-1590
NSN 6110-01-571-2580
NSN 6220-00-650-4216
NSN 5950-01-227-2466
NSN 5990-01-306-9290
NSN 6220-00-424-9935
NSN 6685-00-415-4685
NSN 6150-00-891-7922
NSN 5930-01-653-0103