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 6320-00-857-4073
NSN 5945-01-177-9653
NSN 5998-01-082-6779
NSN 6130-01-294-7481
NSN 5895-01-277-7396
NSN 5915-01-258-5799
NSN 6685-01-082-3087
NSN 6650-01-068-3186
NSN 6650-01-028-2820
NSN 5930-00-827-0488
NSN 5935-01-651-4615
NSN 5960-01-614-8005