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 5835-00-892-3510
NSN 5910-01-532-9260
NSN 6150-01-246-7621
NSN 6645-01-210-8180
NSN 6130-01-523-7783
NSN 5960-00-068-6449
NSN 5990-01-510-4699
NSN 5915-01-592-3411
NSN 5965-01-394-8917
NSN 5996-00-763-6245
NSN 6150-01-120-1206
NSN 6645-00-760-5599