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 6685-01-492-5831
NSN 5960-01-193-5224
NSN 5905-01-061-4076
NSN 5905-01-150-8712
NSN 5965-00-043-3463
NSN 6620-01-168-8450
NSN 6130-00-283-6111
NSN 6220-00-091-0427
NSN 5935-01-224-6228
NSN 5895-00-209-9766
NSN 7035-00-455-7666
NSN 6130-00-442-7473