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 5920-01-136-8843
NSN 5998-00-437-8194
NSN 5915-01-323-7154
NSN 5945-00-831-7608
NSN 5950-01-466-3043
NSN 5985-01-290-8691
NSN 5985-01-414-1797
NSN 5920-01-279-5010
NSN 5996-01-528-5880
NSN 4140-00-012-3506
NSN 5910-01-485-3386
NSN 6685-01-319-4545