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 5920-01-627-3663
NSN 6685-01-011-9086
NSN 6320-00-725-0754
NSN 6145-01-571-6599
NSN 5920-00-054-3381
NSN 6240-01-495-1912
NSN 5960-00-790-0509
NSN 4140-01-451-0361
NSN 5835-01-254-5279
NSN 5990-01-286-0601
NSN 6685-00-276-9889
NSN 6145-01-474-5459