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 5910-01-509-6367
NSN 6150-01-302-8323
NSN 5905-01-334-7889
NSN 5935-00-505-7869
NSN 6610-00-657-5006
NSN 5975-01-323-9454
NSN 6220-00-198-5026
NSN 4140-01-553-2173
NSN 6610-01-164-0589
NSN 4140-01-631-8111
NSN 5975-01-097-2198
NSN 5915-00-232-3387