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 5998-01-503-7509
NSN 5945-01-180-1178
NSN 5835-00-289-9080
NSN 5910-00-751-9581
NSN 6130-01-367-8851
NSN 5915-01-276-7225
NSN 6645-00-023-8386
NSN 5950-01-304-4052
NSN 6105-01-401-5361
NSN 4140-01-189-0217
NSN 4140-01-121-2182
NSN 6220-01-431-7319