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 6320-00-593-0379
NSN 5925-01-540-0472
NSN 7035-01-643-5749
NSN 5835-01-455-3380
NSN 5990-01-089-6743
NSN 6220-01-250-4149
NSN 5945-01-069-8947
NSN 5960-00-274-4905
NSN 5835-01-171-9126
NSN 6220-01-384-2253
NSN 5950-01-633-4839
NSN 5910-00-330-4983