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 6220-00-964-1042
NSN 5950-01-607-8566
NSN 6220-01-631-2641
NSN 5950-01-043-8120
NSN 5996-01-425-1455
NSN 5965-01-276-9586
NSN 5996-01-024-9976
NSN 5998-01-382-1059
NSN 6130-01-231-6389
NSN 6150-01-396-4755
NSN 5945-01-368-5241
NSN 5915-00-244-9805