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 5998-00-355-9635
NSN 5910-00-279-7318
NSN 6110-00-390-8115
NSN 5930-01-084-0698
NSN 5935-01-160-2926
NSN 5920-00-003-5845
NSN 5950-01-584-4755
NSN 6610-01-576-7079
NSN 5835-01-228-8666
NSN 6645-00-347-0356
NSN 2925-00-583-9669
NSN 6150-01-409-2858