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 6110-00-809-8087
NSN 5935-01-263-3928
NSN 5998-01-562-4341
NSN 5996-00-525-1777
NSN 2925-01-503-6792
NSN 5915-01-429-0874
NSN 6240-01-210-8467
NSN 5920-01-365-5878
NSN 5965-01-268-4311
NSN 2925-01-384-4139
NSN 5998-01-109-2442
NSN 5855-01-369-5037