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 5975-00-518-0780
NSN 5965-00-729-6835
NSN 5960-01-515-4791
NSN 5915-00-959-2140
NSN 6650-01-428-9958
NSN 5895-00-353-1795
NSN 5965-01-422-0344
NSN 6240-00-419-4301
NSN 5965-00-033-5928
NSN 5945-01-425-0813
NSN 5945-00-221-4921
NSN 5998-01-296-2050