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 5945-01-052-7443
NSN 5930-01-421-1798
NSN 5895-00-177-7924
NSN 6150-01-207-3170
NSN 7035-00-238-3662
NSN 7035-00-188-6674
NSN 5915-00-211-2219
NSN 5905-00-502-6032
NSN 6650-01-436-3478
NSN 4140-01-452-9428
NSN 5855-01-038-2189
NSN 5895-01-556-6867