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 6620-00-068-2503
NSN 6620-01-034-4539
NSN 5915-01-023-7674
NSN 6685-01-062-2151
NSN 6105-01-268-0604
NSN 5895-01-151-7686
NSN 6320-01-115-4404
NSN 5965-01-512-5009
NSN 5990-00-985-1334
NSN 5935-01-212-8722
NSN 6135-01-089-4888
NSN 6685-01-223-6146