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 5855-00-237-4088
NSN 5855-00-288-1408
NSN 6110-00-866-6140
NSN 6610-00-058-0900
NSN 5930-00-921-1160
NSN 5990-01-097-4721
NSN 5985-00-052-0818
NSN 6620-00-905-6590
NSN 6105-01-539-1615
NSN 6150-01-541-8581
NSN 6110-01-188-3867
NSN 5998-00-146-2120