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 6220-01-250-2376
NSN 6240-00-740-8901
NSN 5895-01-248-0689
NSN 6620-01-552-0426
NSN 5835-00-510-0890
NSN 5905-01-508-3475
NSN 7035-01-633-9537
NSN 5999-01-388-6925
NSN 5998-00-478-1749
NSN 6220-00-110-8921
NSN 6240-01-503-8543
NSN 5975-01-034-3446