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 5996-00-469-4266
NSN 5910-01-649-6135
NSN 5915-00-793-0227
NSN 6130-01-117-7282
NSN 5925-00-624-7415
NSN 5920-01-498-2705
NSN 5975-01-493-5986
NSN 5905-00-529-0508
NSN 5905-00-137-1490
NSN 6610-01-618-7038
NSN 7035-01-564-4617
NSN 6320-01-066-1766