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 6650-00-853-3575
NSN 6105-00-372-4716
NSN 5910-01-462-0401
NSN 5910-01-063-7958
NSN 5930-01-445-6937
NSN 5975-01-414-2007
NSN 5965-01-270-6832
NSN 5925-01-487-0356
NSN 5920-01-542-8877
NSN 6685-00-943-4815
NSN 5975-01-012-1857
NSN 4140-01-290-1733