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 5835-00-275-0584
NSN 6610-01-412-5776
NSN 6135-01-591-4181
NSN 5915-01-647-3831
NSN 5930-01-196-9435
NSN 6610-01-141-9979
NSN 5960-01-503-7582
NSN 5996-00-697-9684
NSN 5855-00-118-8762
NSN 5950-01-317-6194
NSN 6620-01-349-8685
NSN 7035-00-585-2113