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 5960-00-140-9583
NSN 5930-01-504-9657
NSN 5965-00-959-8162
NSN 5935-01-181-8873
NSN 5950-00-891-2645
NSN 5996-00-188-7063
NSN 5945-01-280-3913
NSN 5920-01-054-5315
NSN 6105-00-594-8642
NSN 6110-01-654-8882
NSN 5855-00-446-5921
NSN 5985-01-542-8791