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 5835-01-264-8782
NSN 5935-01-607-0314
NSN 5965-01-037-2277
NSN 5960-01-087-6083
NSN 6110-01-287-8438
NSN 6220-00-218-0857
NSN 6620-00-527-6523
NSN 6145-00-427-7201
NSN 5920-00-290-1844
NSN 6130-00-253-1304
NSN 5999-00-397-4327
NSN 2925-01-140-8957