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 5905-00-931-0377
NSN 6650-00-287-5868
NSN 5910-01-464-7859
NSN 5999-01-357-6399
NSN 6610-01-462-5980
NSN 5835-01-103-8448
NSN 5945-01-029-5411
NSN 5985-01-273-0938
NSN 5855-01-314-8335
NSN 5835-00-473-1010
NSN 2925-00-617-0826
NSN 5965-01-306-1328