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 5990-01-411-5930
NSN 5996-01-146-4202
NSN 5910-01-177-4623
NSN 6620-01-488-9547
NSN 6145-00-236-9504
NSN 6110-01-127-2852
NSN 5835-01-541-9991
NSN 5935-01-145-6258
NSN 5998-01-146-3761
NSN 5925-00-632-6098
NSN 5920-01-094-7284
NSN 6145-00-768-8976