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 5925-00-026-1977
NSN 5998-01-328-2678
NSN 5835-01-510-1873
NSN 6220-01-218-5164
NSN 5920-00-221-8377
NSN 5920-01-327-2574
NSN 6150-00-773-9539
NSN 5996-01-284-4068
NSN 6145-01-377-3714
NSN 6685-01-482-3433
NSN 5910-01-116-3339
NSN 6135-00-334-4500