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 5985-01-486-9164
NSN 6145-01-145-5177
NSN 6145-01-620-9865
NSN 5985-01-436-5733
NSN 5975-01-136-2750
NSN 5998-00-300-2623
NSN 5996-01-056-9046
NSN 5935-01-135-1061
NSN 5895-01-196-6286
NSN 5965-01-416-3633
NSN 6610-00-540-8911
NSN 6105-00-183-4358