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 6220-01-268-1534
NSN 5835-01-319-4636
NSN 6145-01-604-3313
NSN 6220-00-614-7174
NSN 6150-01-539-1736
NSN 6685-01-658-4143
NSN 5945-01-523-0028
NSN 6105-01-399-8556
NSN 5996-01-422-3087
NSN 5996-01-532-0536
NSN 5935-01-303-6111
NSN 6135-00-152-8729