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 6130-01-152-4573
NSN 6130-00-928-6771
NSN 5905-00-610-5698
NSN 5920-00-400-6227
NSN 5960-00-233-5488
NSN 5920-00-009-2052
NSN 6150-01-615-7535
NSN 6110-01-391-6497
NSN 5996-01-429-0390
NSN 5915-01-158-5602
NSN 6320-00-731-6134
NSN 4140-00-552-7370