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 5950-01-535-7015
NSN 5950-01-023-1493
NSN 6645-00-163-9580
NSN 5950-01-030-0114
NSN 4140-01-225-1412
NSN 5935-01-066-0870
NSN 5990-01-074-6549
NSN 5895-01-565-1770
NSN 6610-01-398-8092
NSN 5935-00-839-3448
NSN 5915-00-550-7073
NSN 5935-01-308-8618