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 5975-00-221-7175
NSN 5920-00-398-0766
NSN 6130-01-199-0173
NSN 6240-01-218-4635
NSN 5985-00-233-7284
NSN 5965-01-360-6568
NSN 6650-01-154-1870
NSN 5920-01-076-5560
NSN 5920-01-337-5870
NSN 5925-01-497-7944
NSN 5915-01-589-5632
NSN 5960-01-544-1273