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 5915-01-141-5743
NSN 6320-01-652-3806
NSN 5935-00-842-0279
NSN 5999-01-205-4017
NSN 5975-01-251-4595
NSN 6645-00-211-6906
NSN 5998-01-485-0412
NSN 5945-01-036-1962
NSN 6240-01-629-9868
NSN 5965-01-441-1525
NSN 6110-01-134-6550
NSN 5985-00-257-6804