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 5950-01-159-0825
NSN 5990-01-534-8609
NSN 6135-00-985-7887
NSN 6130-01-141-6517
NSN 6135-00-274-4037
NSN 5935-00-903-7486
NSN 5855-00-256-5562
NSN 5998-01-450-8902
NSN 6645-01-633-1852
NSN 5855-01-553-8437
NSN 5999-01-352-3371
NSN 6135-00-027-3914