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 5950-01-615-0823
NSN 5905-01-518-8868
NSN 4140-00-539-4814
NSN 5915-01-153-7332
NSN 5996-01-265-5150
NSN 5905-00-184-7547
NSN 6130-01-139-4491
NSN 5855-01-644-5841
NSN 5905-00-692-8642
NSN 7035-00-902-8995
NSN 6650-01-567-1933
NSN 6105-01-411-6609