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 5950-01-534-8528
NSN 4140-01-210-8049
NSN 5998-00-443-3107
NSN 5960-01-107-9069
NSN 5905-01-205-7519
NSN 5935-00-355-8771
NSN 6130-00-840-1037
NSN 5835-01-623-3328
NSN 5915-01-260-1643
NSN 6220-01-139-7340
NSN 5935-01-290-1911
NSN 5950-01-091-0383