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 6105-01-245-8725
NSN 6620-01-266-8894
NSN 5998-01-403-2586
NSN 6320-01-304-3639
NSN 5930-00-952-3977
NSN 5945-01-288-9917
NSN 5945-00-336-0505
NSN 6240-00-136-2602
NSN 2925-01-567-8027
NSN 2925-00-590-3450
NSN 5895-01-108-1548
NSN 5935-01-012-7912