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 6135-00-255-1340
NSN 5855-01-655-0356
NSN 6105-01-223-6299
NSN 5985-01-249-1081
NSN 6320-00-082-5868
NSN 5855-01-490-7348
NSN 5965-00-964-1756
NSN 6105-01-239-1199
NSN 6130-01-248-2313
NSN 5835-01-104-5497
NSN 5935-01-254-4916
NSN 5835-01-238-3381