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 5930-00-341-7664
NSN 2925-00-631-0548
NSN 4140-01-421-1132
NSN 6610-01-526-8855
NSN 6105-01-481-0350
NSN 6145-00-734-4554
NSN 5999-00-409-1526
NSN 6110-00-042-0978
NSN 4140-01-448-5614
NSN 6645-00-503-1379
NSN 5925-01-634-0664
NSN 6645-00-443-8011