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 5855-00-631-4565
NSN 6685-00-138-7250
NSN 5835-01-381-8740
NSN 6130-01-055-6219
NSN 5965-00-815-2525
NSN 5965-01-411-9933
NSN 5990-01-236-8399
NSN 5835-01-391-4556
NSN 6610-00-225-9258
NSN 5998-01-160-9373
NSN 5950-01-550-7322
NSN 5835-01-083-2119