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 5998-00-305-4087
NSN 5975-01-020-7869
NSN 4140-00-191-7924
NSN 6650-01-515-8231
NSN 6105-00-905-3135
NSN 5915-00-983-7518
NSN 5905-01-513-6913
NSN 6650-01-338-3823
NSN 6150-01-495-3764
NSN 5998-01-571-3293
NSN 5895-01-470-1108
NSN 5975-00-228-0227