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 5915-00-752-4458
NSN 6105-01-657-6520
NSN 5998-00-278-7350
NSN 5999-01-426-8740
NSN 6650-00-597-7313
NSN 4140-00-660-8699
NSN 4140-01-415-7988
NSN 6145-01-174-0641
NSN 6610-00-972-0869
NSN 5960-00-732-3241
NSN 6240-00-758-6392
NSN 5945-01-252-0561