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 5996-00-833-2521
NSN 6240-01-194-2206
NSN 6320-01-204-2922
NSN 4140-01-633-8108
NSN 5965-00-926-2591
NSN 6145-01-456-2513
NSN 5895-01-108-4315
NSN 6620-01-643-5531
NSN 5835-01-460-6054
NSN 6105-01-118-5445
NSN 6105-01-421-4457
NSN 5920-01-561-8324