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 6145-01-212-2036
NSN 6240-01-435-7973
NSN 5990-01-411-5930
NSN 6150-00-067-5957
NSN 5835-01-587-8787
NSN 5895-01-522-6667
NSN 5960-00-813-0771
NSN 6320-00-422-9006
NSN 5996-01-123-9038
NSN 6110-01-188-0301
NSN 5930-00-885-3887
NSN 6685-00-133-7910