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 5930-01-370-5868
NSN 6135-01-388-8376
NSN 5935-00-882-8961
NSN 6610-01-372-2147
NSN 6685-00-238-6586
NSN 5996-01-500-9861
NSN 6145-00-490-5497
NSN 5925-00-295-5462
NSN 5920-01-131-8362
NSN 5935-01-458-4845
NSN 5965-00-167-1255
NSN 5999-01-045-3340