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 5915-01-461-8673
NSN 5915-00-932-2301
NSN 5945-01-549-1096
NSN 6620-01-578-7561
NSN 2925-01-345-5463
NSN 5910-01-341-0859
NSN 5910-00-276-8592
NSN 6320-01-212-8749
NSN 5985-01-500-0701
NSN 6110-00-744-1301
NSN 5996-01-144-9523
NSN 6645-01-457-0158