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 5950-00-725-0512
NSN 5920-01-604-9426
NSN 5996-01-472-4681
NSN 6620-01-525-5914
NSN 6685-01-315-0661
NSN 6145-01-346-2621
NSN 6105-00-575-9720
NSN 6650-00-905-9317
NSN 5985-01-067-9484
NSN 7035-00-902-8995
NSN 6320-01-624-0193
NSN 5998-01-391-7195