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 5910-00-501-2087
NSN 5915-00-890-0929
NSN 6650-01-484-9505
NSN 6130-01-219-7007
NSN 5945-01-579-5442
NSN 5905-01-047-4640
NSN 5950-01-215-1500
NSN 5998-00-911-5398
NSN 5999-00-083-2684
NSN 6130-00-918-3523
NSN 6130-01-052-7142
NSN 6650-01-556-6941