Used on grumman a10 aircraft
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 5920-00-135-0127
NSN 5920-01-109-3117
NSN 5998-01-519-9273
NSN 6620-01-582-2046
NSN 5960-01-140-4253
NSN 6645-01-422-1374
NSN 6150-01-485-1112
NSN 5855-00-089-3974
NSN 6645-00-363-9775
NSN 6135-01-332-0431
NSN 5910-01-073-0694
NSN 6645-00-411-1130