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 6110-01-254-5278
NSN 4140-01-010-2592
NSN 5985-01-439-1382
NSN 5855-01-532-0402
NSN 4140-01-449-5965
NSN 5996-00-243-1418
NSN 2925-01-277-0873
NSN 5999-00-880-7002
NSN 6685-01-281-8860
NSN 6685-01-081-8704
NSN 5945-00-984-4482
NSN 6240-01-195-8696