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 5895-01-190-5917
NSN 6220-01-591-4337
NSN 7035-01-198-1512
NSN 7035-00-312-3055
NSN 5930-01-302-0367
NSN 2925-01-522-5631
NSN 6105-01-634-0322
NSN 6685-01-366-6956
NSN 6135-00-182-7008
NSN 5915-01-412-2112
NSN 6645-01-422-1374
NSN 5950-01-145-4295