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 6685-00-891-5986
NSN 6240-01-425-1545
NSN 5925-00-019-9047
NSN 5945-00-405-9345
NSN 6145-01-485-4075
NSN 5945-01-649-3349
NSN 6620-01-525-2108
NSN 5920-01-502-3177
NSN 5998-01-011-0420
NSN 5855-01-302-2086
NSN 6150-01-488-1375
NSN 5950-00-924-9993