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 6105-01-268-8150
NSN 6240-01-539-9866
NSN 6135-00-209-6918
NSN 6220-00-754-8375
NSN 6135-01-642-6830
NSN 5930-01-421-4471
NSN 5965-00-434-7617
NSN 5895-01-603-7076
NSN 6130-01-091-9029
NSN 5895-01-344-5027
NSN 5835-01-493-1826
NSN 5950-01-547-6394