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 5920-01-304-4034
NSN 5985-01-355-8177
NSN 6220-00-826-7002
NSN 6130-01-362-1233
NSN 5910-00-263-3630
NSN 6105-01-595-9044
NSN 5996-01-274-0630
NSN 5905-00-807-3327
NSN 5855-01-553-8437
NSN 6685-01-212-3691
NSN 5996-00-868-7170
NSN 5915-01-479-6403