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 6645-01-274-7784
NSN 5985-01-291-9422
NSN 5950-00-202-5861
NSN 5910-01-094-6752
NSN 6620-00-148-9613
NSN 6650-01-445-3393
NSN 5950-01-603-5507
NSN 6130-01-364-1751
NSN 2925-00-580-4931
NSN 5996-00-901-0519
NSN 5835-01-123-8305
NSN 6320-00-593-0379