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 5930-01-474-4344
NSN 6135-01-485-3450
NSN 6610-00-949-6052
NSN 6105-01-464-3777
NSN 6645-01-466-2083
NSN 4140-01-345-3560
NSN 5998-00-900-7946
NSN 5996-01-158-9695
NSN 5835-01-436-6549
NSN 5855-01-503-0144
NSN 5925-01-472-7344
NSN 5998-01-363-9239