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 5990-00-827-6212
NSN 6240-01-546-9756
NSN 5925-01-390-3147
NSN 5855-00-151-3853
NSN 5996-01-553-5946
NSN 5996-01-240-0091
NSN 6110-00-660-8998
NSN 6685-01-428-9618
NSN 5935-01-256-1886
NSN 5905-01-365-5989
NSN 5915-01-136-4035
NSN 4140-00-916-2771