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 5910-01-492-6028
NSN 6320-01-578-6006
NSN 6610-01-164-9477
NSN 6110-00-307-8480
NSN 5935-00-937-8325
NSN 4140-00-358-5312
NSN 5835-01-579-5941
NSN 5990-01-078-1294
NSN 6650-01-348-8792
NSN 5945-01-549-3665
NSN 6650-01-633-9147
NSN 5910-01-262-4133