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 5895-00-766-9431
NSN 6650-01-077-7594
NSN 5950-00-244-2820
NSN 6110-01-072-7883
NSN 6135-01-296-1860
NSN 6110-01-313-7147
NSN 5920-00-284-8879
NSN 6110-01-580-0330
NSN 5855-00-885-8452
NSN 4140-01-425-2934
NSN 6650-00-924-3340
NSN 5930-01-353-5459