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 6135-01-328-6583
NSN 5998-01-231-0906
NSN 6110-01-551-1129
NSN 6220-00-635-8818
NSN 5999-01-523-7415
NSN 5996-01-500-5628
NSN 5925-01-317-1824
NSN 6685-00-375-8689
NSN 5996-00-408-3387
NSN 5975-00-994-9102
NSN 5915-00-378-5585
NSN 6320-01-547-9877