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 5910-01-125-2003
NSN 5920-00-171-2347
NSN 5905-00-336-7859
NSN 5998-01-152-0046
NSN 5960-01-531-4845
NSN 5965-00-985-9157
NSN 5945-01-146-5464
NSN 6320-00-343-1798
NSN 6145-01-115-7933
NSN 6110-01-350-1151
NSN 6105-01-459-2153
NSN 6240-01-358-7127