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 6650-01-541-2628
NSN 5895-01-530-0852
NSN 5920-01-654-6407
NSN 5895-01-421-5375
NSN 5960-00-809-7582
NSN 5925-01-118-6770
NSN 5855-00-560-0110
NSN 5915-00-960-4786
NSN 5835-01-158-6878
NSN 5999-01-509-3134
NSN 5975-00-621-6327
NSN 6105-01-647-4683