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 6650-01-108-2948
NSN 5855-01-429-8702
NSN 5855-01-100-3272
NSN 6145-00-170-4044
NSN 5999-01-037-2080
NSN 6130-01-248-9222
NSN 5965-01-170-9891
NSN 5998-01-493-9193
NSN 6145-00-308-0247
NSN 6320-01-296-3181
NSN 5998-00-900-5882
NSN 6130-00-833-7763