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 6110-01-082-4172
NSN 5855-01-409-1792
NSN 5855-00-466-2309
NSN 5935-01-135-2059
NSN 6650-01-098-6914
NSN 5999-01-480-7551
NSN 5910-00-700-2679
NSN 5925-00-272-8959
NSN 5999-01-142-2608
NSN 5985-01-360-6466
NSN 2925-01-542-1865
NSN 5990-00-191-6290