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 5835-01-575-1778
NSN 5930-01-137-1266
NSN 6620-01-476-7355
NSN 6150-01-502-7522
NSN 6685-00-261-9858
NSN 2925-01-151-6969
NSN 6620-01-371-1655
NSN 5945-01-484-4346
NSN 6220-00-035-6736
NSN 6685-00-125-4472
NSN 6110-00-492-9392
NSN 5895-01-541-5483