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 6150-01-493-7683
NSN 6620-01-206-6075
NSN 5905-00-760-1207
NSN 5935-00-221-7465
NSN 5945-01-075-0200
NSN 6610-01-065-6057
NSN 6150-01-502-8628
NSN 6610-01-097-5073
NSN 2925-01-143-0092
NSN 5998-01-623-9103
NSN 6110-00-542-2202
NSN 6620-00-421-7509