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 6645-01-258-5558
NSN 5950-00-244-3685
NSN 5960-01-597-9591
NSN 5945-01-318-8057
NSN 5910-01-142-1299
NSN 6240-01-154-6840
NSN 5835-01-485-0210
NSN 5935-00-143-1399
NSN 6685-01-470-9416
NSN 5915-00-473-9299
NSN 6130-01-068-3362
NSN 5999-01-440-2279