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 5855-00-916-2236
NSN 5905-01-060-5986
NSN 6220-01-279-1331
NSN 6610-01-159-0438
NSN 6620-01-148-1675
NSN 6320-00-823-2015
NSN 6150-01-597-5857
NSN 5985-01-133-4411
NSN 5975-01-545-2621
NSN 5996-01-134-9922
NSN 5910-01-384-2142
NSN 6135-00-027-3914