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 5895-00-144-9114
NSN 6110-01-364-2145
NSN 5965-01-547-4779
NSN 5985-01-196-5866
NSN 6610-00-898-0020
NSN 5999-01-540-7884
NSN 5999-01-586-2056
NSN 5895-01-406-1586
NSN 5895-01-619-9427
NSN 6650-00-158-3683
NSN 5855-01-656-6808
NSN 6620-01-385-6172