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 6105-01-105-5054
NSN 5965-01-220-0529
NSN 5965-00-543-1837
NSN 5920-01-295-3267
NSN 6650-00-150-6885
NSN 5965-01-515-2009
NSN 5998-01-026-1979
NSN 6320-01-322-4950
NSN 5925-01-549-7714
NSN 5855-01-542-9059
NSN 4140-00-229-8467
NSN 5999-00-216-7431