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 5855-00-763-2155
NSN 5930-01-472-9445
NSN 5915-01-385-0874
NSN 5975-00-518-0780
NSN 5975-00-111-1226
NSN 5960-00-938-7569
NSN 5998-01-074-8057
NSN 5965-01-485-3501
NSN 5920-01-244-8299
NSN 6105-01-490-1009
NSN 5905-01-634-0595
NSN 6105-01-440-2771