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 6220-01-197-8662
NSN 6620-01-395-2968
NSN 7035-01-270-0325
NSN 5925-01-539-0576
NSN 5998-00-190-2007
NSN 5920-00-574-7510
NSN 7035-01-590-4065
NSN 5905-00-588-2396
NSN 5855-01-539-0639
NSN 5935-01-106-2931
NSN 6610-00-483-9810
NSN 5945-00-012-4441