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 5990-00-288-1820
NSN 6645-00-462-7072
NSN 6150-01-224-2899
NSN 5960-01-512-0233
NSN 5945-01-472-3424
NSN 5985-01-352-5696
NSN 5960-00-253-1473
NSN 6150-01-348-5855
NSN 6620-01-310-2103
NSN 5975-00-518-0780
NSN 5965-00-842-9060
NSN 6320-01-117-5516