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 5895-01-315-0060
NSN 5905-01-259-6314
NSN 6620-01-527-9798
NSN 5965-01-168-8180
NSN 6220-01-344-1647
NSN 6105-00-964-3318
NSN 5925-01-228-8700
NSN 5920-00-837-2633
NSN 5960-00-300-2357
NSN 5905-00-570-2128
NSN 4140-01-361-5224
NSN 5990-00-920-2894