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 4140-01-419-5976
NSN 5990-01-272-4091
NSN 5935-01-481-3438
NSN 5935-01-243-1137
NSN 2925-00-461-4954
NSN 5996-00-918-9330
NSN 5905-00-935-6954
NSN 5835-01-422-2399
NSN 5925-01-476-3879
NSN 5965-01-415-7080
NSN 5920-00-204-8125
NSN 5990-01-296-8190