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 6220-00-892-5187
NSN 5996-01-633-6119
NSN 5915-01-004-9319
NSN 6240-01-005-3456
NSN 6240-00-290-4185
NSN 6650-01-386-1300
NSN 6105-01-437-9661
NSN 5835-01-126-2480
NSN 6130-00-199-4210
NSN 4140-00-497-1322
NSN 6320-01-436-9228
NSN 5960-01-469-2006