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 6150-01-577-6908
NSN 4140-01-466-8879
NSN 5925-00-155-2587
NSN 5915-00-937-9580
NSN 4140-00-963-8285
NSN 6105-01-431-5681
NSN 5835-00-759-1109
NSN 5895-00-936-9964
NSN 5996-01-589-6045
NSN 5945-01-222-0847
NSN 6145-00-577-3505
NSN 5910-00-926-2499