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 6130-01-266-0964
NSN 6620-01-095-8937
NSN 7035-01-088-3023
NSN 5999-01-542-6417
NSN 5950-01-250-4710
NSN 5998-00-901-0298
NSN 6650-01-632-7757
NSN 6610-01-165-2103
NSN 6620-00-842-6372
NSN 5835-01-616-6131
NSN 5999-01-368-5511
NSN 6650-00-878-8909