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 5998-01-472-2146
NSN 5965-00-123-1727
NSN 6650-01-562-0096
NSN 6220-00-621-4240
NSN 5925-01-165-7053
NSN 5975-01-271-3283
NSN 5895-00-788-0451
NSN 5950-01-531-1856
NSN 6610-00-186-9180
NSN 5895-01-634-0630
NSN 2925-00-794-5937
NSN 5930-01-152-2621