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 4140-01-446-6832
NSN 5996-01-310-2986
NSN 6110-00-268-2919
NSN 6240-01-200-7937
NSN 5965-00-461-2594
NSN 6610-00-321-3462
NSN 5915-00-287-9927
NSN 5950-00-529-6871
NSN 6150-01-370-2619
NSN 5910-01-070-8734
NSN 6150-00-130-8206
NSN 5855-00-411-8688