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 5945-00-756-0455
NSN 5960-01-213-6292
NSN 5975-01-392-9703
NSN 6240-01-399-4105
NSN 7035-00-679-9027
NSN 5990-00-933-9110
NSN 5935-00-555-1871
NSN 6320-00-270-8222
NSN 5996-00-351-2369
NSN 5990-00-999-8486
NSN 6105-00-566-7002
NSN 6320-00-032-4853