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 6130-01-588-1234
NSN 5905-01-443-2407
NSN 5910-01-633-9963
NSN 5925-01-576-1619
NSN 6110-01-626-8027
NSN 5945-01-116-8989
NSN 5895-00-480-3254
NSN 5985-01-463-5379
NSN 5960-01-411-5899
NSN 5999-01-357-6399
NSN 5920-01-163-3973
NSN 5999-00-778-0116