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 6130-00-113-1281
NSN 6130-01-065-2368
NSN 5855-01-464-3152
NSN 5965-00-402-5208
NSN 6105-01-645-4935
NSN 2925-01-110-1467
NSN 5910-00-108-8462
NSN 5999-00-077-4567
NSN 5965-00-052-9184
NSN 5998-00-013-9334
NSN 4140-00-104-7323
NSN 5835-01-381-2683