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 5990-00-140-4559
NSN 5965-00-006-3104
NSN 5920-00-170-3576
NSN 5960-01-058-1074
NSN 5920-00-351-8428
NSN 5930-01-362-1596
NSN 5920-01-255-2441
NSN 6240-01-560-6424
NSN 5930-00-578-3971
NSN 6610-01-603-7069
NSN 5920-00-776-0633
NSN 6620-01-462-0001