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 6650-00-088-4741
NSN 5915-01-332-3821
NSN 6320-01-462-3555
NSN 5910-01-434-6770
NSN 6105-00-556-6333
NSN 6610-00-135-5815
NSN 5965-01-467-1872
NSN 5998-00-462-8290
NSN 5925-00-081-9135
NSN 5998-01-374-9287
NSN 6620-01-239-3804
NSN 6320-01-450-7513