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 5905-01-530-4342
NSN 5935-01-484-9635
NSN 5905-00-473-7972
NSN 6240-00-758-3367
NSN 5925-01-506-0593
NSN 6150-01-572-2572
NSN 5915-01-441-2238
NSN 6105-01-468-5605
NSN 6645-00-862-2904
NSN 6650-01-292-5079
NSN 5998-01-363-9935
NSN 6135-00-686-4777