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 5915-01-480-4044
NSN 6105-01-536-1414
NSN 5925-01-342-2745
NSN 5930-01-448-7272
NSN 6110-01-326-7311
NSN 4140-00-146-1633
NSN 5835-00-998-5757
NSN 5920-00-581-7958
NSN 5925-00-101-2453
NSN 5965-01-367-7792
NSN 6620-00-079-0311
NSN 6240-00-630-8069