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 5960-01-509-8779
NSN 6135-01-201-5858
NSN 6650-00-526-7785
NSN 5910-01-313-7599
NSN 5895-00-391-8084
NSN 5990-00-197-0159
NSN 6110-01-649-7327
NSN 6130-01-287-3931
NSN 6610-01-566-8198
NSN 5920-00-409-3650
NSN 6685-01-258-3218
NSN 5999-00-117-4567