Material is grade 5 steel
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.)
Classification: Nuts of iron or steel
NSN 6645-00-881-9978
NSN 5895-01-379-5699
NSN 6620-00-306-5075
NSN 5960-00-973-3104
NSN 6130-01-477-9259
NSN 6645-01-633-1852
NSN 5960-01-462-7704
NSN 5935-01-248-3386
NSN 6620-01-208-5915
NSN 6130-01-055-6846
NSN 5835-01-581-1957
NSN 6135-00-880-1026