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 6145-01-508-5017
NSN 5925-01-371-1360
NSN 5985-01-050-8609
NSN 5835-01-099-4573
NSN 5920-01-144-5608
NSN 5950-01-501-5049
NSN 5935-01-044-1612
NSN 5895-01-656-9515
NSN 6135-01-567-0739
NSN 6105-01-311-3234
NSN 4140-00-111-2617
NSN 6110-01-045-3256