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 6145-00-056-2046
NSN 5835-01-163-4215
NSN 4140-00-168-1920
NSN 5835-00-087-9512
NSN 7035-00-104-7613
NSN 6320-01-543-3238
NSN 5975-01-537-5200
NSN 5950-01-147-8307
NSN 5998-01-467-3173
NSN 5935-01-013-0341
NSN 6150-01-504-2607
NSN 5985-01-049-5455