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 7035-01-254-3606
NSN 5930-01-411-4980
NSN 5999-01-370-1344
NSN 5920-00-180-0223
NSN 6645-01-370-4259
NSN 6130-01-526-0554
NSN 5950-01-502-7333
NSN 6110-00-269-2696
NSN 6135-01-540-5253
NSN 5920-00-398-0766
NSN 5950-01-310-7321
NSN 5950-00-801-8293