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 5998-00-098-2111
NSN 5998-01-437-8870
NSN 6105-01-512-7888
NSN 5855-01-397-2487
NSN 5975-01-550-9590
NSN 5905-00-402-9082
NSN 5945-00-445-0921
NSN 6130-01-156-4153
NSN 5999-01-428-4401
NSN 5965-00-862-3295
NSN 5835-01-286-3600
NSN 6150-01-634-0575