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 6620-00-241-5264
NSN 5910-00-643-9033
NSN 5975-01-417-2996
NSN 5835-00-931-5568
NSN 5905-00-274-3789
NSN 5855-01-425-1330
NSN 5905-00-584-6617
NSN 5996-00-671-7304
NSN 5985-01-425-5588
NSN 5985-01-226-5653
NSN 5965-01-234-6844
NSN 5985-01-519-9295