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 6610-00-551-3610
NSN 6685-01-065-3511
NSN 5915-01-515-5365
NSN 6610-01-460-8898
NSN 6610-01-496-6758
NSN 6645-01-196-8616
NSN 6240-00-567-4795
NSN 6150-01-411-3374
NSN 5895-01-236-8969
NSN 5985-01-338-6686
NSN 6685-01-041-4407
NSN 5925-00-064-9873