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 6320-00-139-1090
NSN 5960-01-649-1341
NSN 7035-01-380-3759
NSN 6105-00-246-7116
NSN 5945-01-501-0287
NSN 6240-00-459-5367
NSN 6145-01-553-8655
NSN 5950-00-486-0523
NSN 7035-01-452-4306
NSN 5920-01-560-9487
NSN 5895-01-549-1740
NSN 5998-01-160-0249