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 5835-00-435-1428
NSN 6135-00-756-6149
NSN 5990-01-561-7802
NSN 6130-01-422-1850
NSN 6620-01-373-4588
NSN 5998-00-114-0575
NSN 5935-01-187-9131
NSN 5910-00-245-0940
NSN 5996-00-340-5634
NSN 5945-01-041-3522
NSN 5985-01-011-7406
NSN 6105-01-369-6173