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 6240-00-079-1759
NSN 5920-01-523-4561
NSN 6320-01-185-3857
NSN 5905-00-233-1790
NSN 5999-00-276-9299
NSN 6685-00-808-1984
NSN 5950-01-648-2677
NSN 6150-00-189-0292
NSN 5895-00-064-8065
NSN 4140-00-561-9218
NSN 5996-01-062-0807
NSN 6145-01-421-4257