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 5920-00-246-5992
NSN 5965-01-515-0589
NSN 5999-00-116-2048
NSN 5895-00-276-7916
NSN 5998-01-114-2097
NSN 6320-01-429-5728
NSN 6110-01-227-2617
NSN 6130-00-005-7882
NSN 5990-00-230-8981
NSN 5925-01-139-6098
NSN 6150-01-615-1627
NSN 5910-01-450-1182