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 5990-01-206-3606
NSN 5965-01-063-7894
NSN 6240-01-583-3259
NSN 6685-00-263-4545
NSN 5985-00-723-6419
NSN 6620-01-411-2295
NSN 5950-01-334-0024
NSN 5998-00-633-5169
NSN 5965-01-125-5367
NSN 5999-01-049-0877
NSN 6620-01-302-3549
NSN 5905-01-399-2315