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 5920-01-338-1410
NSN 5910-00-551-2442
NSN 5855-00-832-9341
NSN 5905-01-615-5962
NSN 6610-00-173-4011
NSN 5915-01-227-2337
NSN 6685-01-605-8931
NSN 5998-01-464-2915
NSN 5915-01-417-3120
NSN 5935-01-035-7822
NSN 5998-01-546-3630
NSN 5990-01-408-6554