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 5915-01-440-7456
NSN 4140-01-221-9255
NSN 6110-01-160-5257
NSN 5999-01-518-5086
NSN 6110-00-760-6394
NSN 6240-00-227-0135
NSN 5950-01-516-2175
NSN 5910-00-780-8611
NSN 6620-00-321-3630
NSN 6150-01-444-1012
NSN 6240-01-508-4146
NSN 5975-00-026-0933