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 5990-01-540-1619
NSN 6150-00-285-6083
NSN 5835-01-092-5346
NSN 6105-01-321-7063
NSN 6240-01-379-4547
NSN 6685-00-992-0448
NSN 4140-00-218-3579
NSN 5990-00-070-3006
NSN 5910-01-567-2570
NSN 5996-01-422-7288
NSN 2925-01-157-9204
NSN 5996-01-374-4798