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 5960-01-434-5539
NSN 5905-00-275-0668
NSN 6620-01-646-2751
NSN 6105-01-149-1963
NSN 5975-00-737-6878
NSN 5930-01-621-3039
NSN 6220-01-437-9002
NSN 6130-01-612-8400
NSN 6610-00-374-1563
NSN 5905-01-045-4190
NSN 5965-00-971-5522
NSN 6150-01-269-4061