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 5910-01-274-1278
NSN 6135-01-544-2630
NSN 4140-00-231-1475
NSN 6150-00-822-1528
NSN 5935-00-057-7068
NSN 5965-01-026-9865
NSN 6645-01-372-2600
NSN 5990-01-623-0082
NSN 2925-01-567-8027
NSN 5996-01-349-0261
NSN 6650-00-653-1744
NSN 6240-01-092-8846