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 5905-00-550-0937
NSN 5950-01-551-3675
NSN 5998-00-201-7564
NSN 5945-00-540-1052
NSN 6130-01-509-8748
NSN 5998-01-556-6942
NSN 5920-01-273-5461
NSN 5945-01-615-8791
NSN 5990-01-054-4255
NSN 5930-01-147-3048
NSN 5835-00-034-4976
NSN 6110-01-323-5273