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 6610-01-141-7014
NSN 5998-01-624-0163
NSN 5998-00-367-2691
NSN 5990-00-079-0932
NSN 5990-01-485-0260
NSN 5975-00-752-7644
NSN 5975-00-834-7840
NSN 5835-01-380-5943
NSN 6240-00-479-5057
NSN 5960-00-156-0702
NSN 5945-01-509-0749
NSN 6110-01-562-3392