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 6620-01-633-7058
NSN 6105-01-431-8998
NSN 6645-01-212-9474
NSN 5835-01-576-9013
NSN 5975-01-058-8293
NSN 6105-01-272-9235
NSN 4140-01-234-1736
NSN 5835-01-509-8992
NSN 5975-00-925-1197
NSN 5925-01-181-4740
NSN 5835-01-150-6084
NSN 6685-01-444-5991