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 6220-01-292-0980
NSN 5996-01-019-0664
NSN 5915-00-156-2083
NSN 5990-00-974-1918
NSN 5915-01-074-4298
NSN 6620-00-816-9755
NSN 5935-00-998-6913
NSN 5950-01-629-2863
NSN 5965-01-512-5009
NSN 4140-01-508-4512
NSN 6220-01-096-7700
NSN 6685-00-248-5820