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 5835-00-348-8549
NSN 5985-01-536-5339
NSN 5915-00-593-8212
NSN 5895-01-391-5682
NSN 5915-01-432-5360
NSN 4140-01-413-3924
NSN 5930-00-498-2741
NSN 6620-00-043-6082
NSN 5998-01-345-8801
NSN 5985-01-588-6727
NSN 5996-00-240-3224
NSN 5920-00-507-5105