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 5905-00-186-0942
NSN 5945-00-881-9975
NSN 6135-00-488-4478
NSN 5998-01-368-0945
NSN 5990-01-268-2236
NSN 5985-01-613-5061
NSN 6150-01-060-8496
NSN 5975-01-180-9892
NSN 6240-00-353-5753
NSN 5985-01-013-4302
NSN 5990-00-681-2789
NSN 5905-00-372-5214