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 5999-00-608-7077
NSN 5950-00-042-6541
NSN 6650-01-219-3731
NSN 6135-00-900-2139
NSN 6320-00-004-9158
NSN 2925-00-516-8841
NSN 5996-01-602-5655
NSN 5999-00-517-9503
NSN 6130-01-230-5037
NSN 6145-01-487-3773
NSN 2925-00-411-6324
NSN 6110-00-905-6148