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 5998-01-194-5252
NSN 5905-01-152-7941
NSN 5965-01-562-0811
NSN 5990-01-168-3257
NSN 5930-01-626-1098
NSN 5950-01-049-9278
NSN 6610-01-641-8847
NSN 6150-01-474-9963
NSN 5998-01-276-7797
NSN 5945-01-321-4768
NSN 5915-00-522-7775
NSN 5935-00-857-8892