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 5930-01-066-6614
NSN 5905-00-296-8763
NSN 6240-01-253-0687
NSN 6150-00-317-2003
NSN 5920-00-284-9220
NSN 6105-00-518-4703
NSN 5999-01-354-9830
NSN 5950-00-973-2245
NSN 5960-00-925-0752
NSN 6150-00-554-3362
NSN 5855-01-228-0942
NSN 6130-00-573-5634