A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
NSN 6320-00-994-0179
NSN 5985-01-181-4837
NSN 5835-00-289-9080
NSN 5996-00-348-2689
NSN 6240-00-899-6990
NSN 5910-00-066-7435
NSN 5990-00-874-3036
NSN 6135-00-919-1117
NSN 6145-01-420-2163
NSN 6150-00-753-3950
NSN 5935-00-995-8039
NSN 5895-01-462-1605