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 5996-00-178-1016
NSN 5990-01-271-8130
NSN 6645-01-028-2186
NSN 5920-00-369-0631
NSN 5999-01-464-2241
NSN 6650-01-290-4001
NSN 6110-01-269-8482
NSN 5930-01-100-1853
NSN 6645-01-424-4667
NSN 5835-01-436-6549
NSN 5895-00-954-3716
NSN 6240-01-387-2727