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 5990-00-398-0507
NSN 2925-00-477-2654
NSN 6145-01-139-1477
NSN 2925-01-308-2195
NSN 6150-01-182-7489
NSN 5915-01-385-1044
NSN 6150-01-448-0037
NSN 6610-01-186-8798
NSN 6220-00-872-3032
NSN 5999-00-086-8567
NSN 2925-01-027-1293
NSN 5835-01-337-8635