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 5999-01-101-5910
NSN 5960-00-821-8739
NSN 5999-00-394-7191
NSN 5998-01-550-9550
NSN 6650-00-510-3786
NSN 5960-00-338-9164
NSN 5855-00-198-3197
NSN 6130-00-075-7979
NSN 6135-01-142-2417
NSN 5935-01-085-2790
NSN 6240-00-478-3858
NSN 5996-01-544-4811