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 6240-00-975-0868
NSN 5930-01-317-2209
NSN 5895-01-340-9483
NSN 4140-00-258-3612
NSN 5985-00-950-8187
NSN 6685-01-540-8550
NSN 5930-00-546-9605
NSN 6650-01-609-1993
NSN 6110-00-922-5311
NSN 6130-00-365-4572
NSN 6150-01-406-5311
NSN 5985-01-271-1757