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 5998-01-597-9420
NSN 6320-01-125-3361
NSN 6130-01-510-1816
NSN 5950-00-905-1583
NSN 6110-01-014-3840
NSN 5945-01-591-6005
NSN 5920-00-817-3387
NSN 4140-01-065-0314
NSN 5998-01-475-3773
NSN 5985-01-441-3125
NSN 6130-00-844-2792
NSN 5835-01-583-0453