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 5985-00-729-5599
NSN 6240-00-256-6410
NSN 6150-01-461-3217
NSN 5998-01-414-3783
NSN 5920-01-551-8088
NSN 6240-00-196-4518
NSN 5855-01-618-1921
NSN 5915-01-263-5183
NSN 6620-00-472-5146
NSN 6240-01-008-2935
NSN 5895-00-257-5945
NSN 5905-01-291-4274