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 5990-00-410-6202
NSN 6645-00-551-8291
NSN 5920-01-279-4359
NSN 5975-01-510-9722
NSN 5950-01-111-8481
NSN 5925-00-173-3438
NSN 5999-01-530-7665
NSN 5990-01-426-7350
NSN 5925-01-660-3505
NSN 6135-00-351-8606
NSN 5905-01-421-1241
NSN 5935-01-547-2289