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 6110-01-568-9540
NSN 5985-01-523-7444
NSN 5925-01-604-8859
NSN 5998-01-242-6782
NSN 5996-01-456-4524
NSN 6105-01-050-7795
NSN 6645-00-183-8812
NSN 6240-01-623-3798
NSN 6130-01-146-9715
NSN 6135-00-913-2062
NSN 5855-00-532-0025
NSN 5985-00-186-0732