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 5855-01-442-5279
NSN 6220-01-605-2534
NSN 6650-00-866-9947
NSN 5910-00-134-1463
NSN 5965-01-154-6319
NSN 7035-01-647-9698
NSN 5855-01-228-0942
NSN 6150-01-298-8511
NSN 5910-00-609-7468
NSN 6105-01-180-5013
NSN 6685-01-357-6358
NSN 5935-01-320-9372