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 6145-00-923-1970
NSN 5965-00-144-2543
NSN 6105-01-383-0988
NSN 6685-00-193-0201
NSN 6240-00-170-5302
NSN 6110-01-495-2211
NSN 5920-01-448-9208
NSN 5855-01-505-5144
NSN 5996-01-104-4161
NSN 5975-01-074-6890
NSN 6145-00-394-4511
NSN 5990-01-395-4194