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 5905-00-156-2982
NSN 5910-00-289-3712
NSN 5965-01-088-1761
NSN 5915-01-293-1069
NSN 6150-01-254-6580
NSN 6320-01-215-1133
NSN 6110-00-627-7872
NSN 5960-00-829-3429
NSN 5990-01-018-1994
NSN 5905-01-319-2929
NSN 6130-00-700-1190
NSN 5990-01-390-2177