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 5905-01-134-2368
NSN 6110-00-458-2083
NSN 6135-01-370-2599
NSN 5950-01-169-1005
NSN 5915-01-120-9173
NSN 5985-01-485-2416
NSN 6320-00-578-6898
NSN 6320-01-648-5538
NSN 7035-00-421-8710
NSN 5999-01-281-8193
NSN 4140-00-093-7679
NSN 7035-01-218-6960