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 6610-00-885-7000
NSN 5895-00-090-6565
NSN 4140-01-020-1116
NSN 5895-01-302-2127
NSN 5835-01-466-5496
NSN 5835-01-538-8080
NSN 5910-01-398-9568
NSN 5905-01-508-4193
NSN 6620-01-259-5944
NSN 6150-01-146-5562
NSN 6685-01-197-7703
NSN 5905-00-290-8098