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 5996-01-559-0284
NSN 4140-00-580-0716
NSN 5996-01-615-1195
NSN 5835-00-896-9597
NSN 5930-00-194-0748
NSN 5990-01-284-3187
NSN 6620-01-070-9042
NSN 5998-00-781-9588
NSN 5930-00-408-2279
NSN 5920-01-141-6885
NSN 6620-01-209-1472
NSN 2925-01-067-0123