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 5996-01-555-7690
NSN 6135-01-100-3593
NSN 5960-00-908-2416
NSN 5920-00-296-0454
NSN 7035-00-230-4338
NSN 6145-01-204-7021
NSN 5905-00-061-2106
NSN 5996-01-562-4780
NSN 5985-01-413-6660
NSN 6220-01-472-3785
NSN 5999-01-195-8648
NSN 6220-01-470-4166