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 6620-01-391-1920
NSN 5935-00-800-0203
NSN 5925-01-518-4474
NSN 5975-01-591-0721
NSN 5965-01-488-6695
NSN 6130-00-316-9412
NSN 5950-01-325-7834
NSN 6240-01-093-0039
NSN 5935-00-717-1854
NSN 6620-00-028-3370
NSN 5930-01-100-9698
NSN 5915-01-435-5275