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 6150-01-393-4476
NSN 6240-00-677-0305
NSN 5920-00-938-2504
NSN 5925-00-153-4518
NSN 5910-00-538-4988
NSN 6240-01-225-2994
NSN 5910-00-753-2850
NSN 5920-01-370-6343
NSN 5950-01-273-3593
NSN 5835-01-350-0566
NSN 5945-01-136-4592
NSN 6105-01-468-5605