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 6320-01-627-8295
NSN 5990-01-568-5565
NSN 5910-01-534-5054
NSN 5950-01-075-7275
NSN 5835-00-143-4153
NSN 6220-00-485-1428
NSN 5895-01-496-1430
NSN 5855-01-441-1392
NSN 5998-01-253-9786
NSN 5895-01-551-2323
NSN 5960-00-463-5945
NSN 5960-01-413-3877