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 6145-00-440-3503
NSN 5990-00-284-0537
NSN 5999-00-187-5372
NSN 6110-00-065-4742
NSN 5935-01-408-5214
NSN 5998-01-193-8940
NSN 2925-01-292-9248
NSN 6130-00-837-2409
NSN 5855-01-564-2044
NSN 5835-01-381-2683
NSN 5975-00-936-7377
NSN 6320-01-592-6248