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 6240-00-617-9599
NSN 6320-01-021-6633
NSN 6145-00-079-7378
NSN 6685-00-413-4722
NSN 6110-01-441-8151
NSN 6145-01-592-8308
NSN 5945-01-602-7409
NSN 5895-00-208-7581
NSN 5855-01-604-4161
NSN 5910-01-393-6503
NSN 5855-01-509-6872
NSN 7035-01-483-4194