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 6650-01-014-5990
NSN 5925-01-532-8894
NSN 6685-01-384-0728
NSN 5945-00-299-7152
NSN 5935-00-983-6256
NSN 6150-00-244-5044
NSN 6685-01-293-1267
NSN 5965-01-029-5222
NSN 5835-00-236-8414
NSN 5905-01-185-8386
NSN 5996-01-633-7979
NSN 5895-01-086-2706