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 5930-01-599-6653
NSN 4140-01-340-2579
NSN 2925-01-255-6394
NSN 5945-00-170-8645
NSN 5985-01-231-9272
NSN 5835-01-462-5983
NSN 5935-01-349-0221
NSN 5985-00-817-3693
NSN 5920-01-140-1120
NSN 5920-01-357-5785
NSN 6320-01-429-9871
NSN 4140-01-178-9391