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 6645-01-352-6583
NSN 6650-01-348-8792
NSN 5915-00-308-2469
NSN 6105-00-527-2193
NSN 5945-00-124-2027
NSN 6645-01-365-1511
NSN 5999-01-586-3112
NSN 2925-00-099-4030
NSN 5905-01-422-2504
NSN 6685-01-163-3715
NSN 6610-01-127-0724
NSN 5999-01-533-8085