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 5835-01-501-0526
NSN 6110-01-062-0252
NSN 5998-00-862-7299
NSN 6685-01-171-2000
NSN 5990-01-269-2111
NSN 5998-00-711-2352
NSN 6320-01-415-0953
NSN 6240-01-130-7854
NSN 6220-00-425-7569
NSN 5996-01-317-7289
NSN 5996-00-791-0703
NSN 5935-01-413-1982