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 6105-01-576-8398
NSN 5960-00-930-5092
NSN 4140-01-515-1121
NSN 5950-01-413-0793
NSN 6110-01-437-6430
NSN 6150-01-658-9530
NSN 5990-00-258-0228
NSN 6150-01-233-1746
NSN 5855-00-237-4088
NSN 5998-00-011-2462
NSN 6650-01-613-6780
NSN 5915-01-254-4243