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 6650-00-872-0942
NSN 5835-01-232-6904
NSN 5915-01-350-4636
NSN 6105-01-120-4285
NSN 5996-00-841-5534
NSN 4140-00-370-1257
NSN 5895-01-541-4812
NSN 6320-01-631-7828
NSN 6130-00-172-5896
NSN 6105-01-281-7714
NSN 6685-01-091-9727
NSN 6620-01-012-2852