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 5985-01-358-9010
NSN 6620-01-558-6558
NSN 5965-01-416-8219
NSN 6130-01-241-8953
NSN 6135-01-340-2599
NSN 5985-01-038-4437
NSN 6645-00-004-8628
NSN 5999-00-038-0529
NSN 5999-00-151-9955
NSN 5915-00-704-1609
NSN 6220-01-381-1074
NSN 5999-00-296-2133