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 6610-01-514-7181
NSN 6620-01-137-4228
NSN 6135-01-176-2206
NSN 6145-01-651-3082
NSN 5915-01-184-8387
NSN 5925-01-058-6079
NSN 5910-01-170-0159
NSN 2925-00-241-5244
NSN 5950-00-452-1300
NSN 6650-01-280-8456
NSN 6320-00-228-5678
NSN 4140-01-327-1858