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 6610-01-503-0153
NSN 5965-01-528-8152
NSN 5925-01-442-0650
NSN 5910-00-988-8167
NSN 5965-01-141-6485
NSN 6105-00-054-6767
NSN 5996-00-319-1820
NSN 5915-01-302-4884
NSN 6150-00-908-7407
NSN 6320-01-116-3980
NSN 5975-00-940-7820
NSN 5950-00-153-1959