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 6135-01-122-4448
NSN 6240-00-109-5914
NSN 7035-01-615-7707
NSN 5855-01-088-8700
NSN 5935-01-177-3772
NSN 2925-01-269-3861
NSN 5930-00-660-4417
NSN 6220-01-342-2796
NSN 5935-00-418-3364
NSN 6645-00-143-1567
NSN 6620-01-106-2814
NSN 6320-01-157-9076