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 6130-00-809-5267
NSN 5950-01-146-4329
NSN 6240-00-580-0666
NSN 5996-00-008-3266
NSN 6650-01-185-2544
NSN 6130-00-523-9210
NSN 6610-01-360-3564
NSN 5920-01-019-1989
NSN 6620-01-328-7059
NSN 5945-01-282-0493
NSN 6240-01-571-7706
NSN 6620-00-829-1860