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 5950-01-315-3858
NSN 5965-00-064-8209
NSN 6220-01-263-3899
NSN 5996-01-162-6613
NSN 6650-01-414-9784
NSN 4140-01-032-3705
NSN 2925-00-504-2363
NSN 2925-01-206-7948
NSN 5965-01-595-4213
NSN 6620-01-164-0590
NSN 2925-01-254-3068
NSN 4140-01-474-6268