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 6650-01-420-5586
NSN 5930-01-364-9012
NSN 5910-00-476-8574
NSN 5930-00-246-2074
NSN 5935-01-359-8962
NSN 6650-01-279-2055
NSN 6240-01-491-1754
NSN 7035-01-499-7401
NSN 6620-00-847-6385
NSN 6130-01-561-3868
NSN 5998-00-754-0663
NSN 2925-00-554-6956