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 6320-00-731-6134
NSN 6685-01-461-3223
NSN 5855-00-586-6255
NSN 6150-00-111-4099
NSN 5905-01-384-6980
NSN 5999-01-371-2185
NSN 6240-01-183-0893
NSN 5930-01-466-1966
NSN 6320-01-170-4068
NSN 5910-01-464-2879
NSN 5930-01-421-3005
NSN 6110-01-084-8217