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 6240-01-242-7733
NSN 5855-00-149-0766
NSN 5965-01-238-0488
NSN 6135-01-177-3552
NSN 5895-01-564-8825
NSN 5945-01-099-4799
NSN 6620-01-480-3407
NSN 6650-00-684-3060
NSN 5998-00-233-6401
NSN 2925-01-600-2309
NSN 5965-01-342-2865
NSN 6135-01-265-1384