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 5920-00-199-9498
NSN 5855-01-400-1590
NSN 6240-00-880-8700
NSN 6135-01-032-8887
NSN 5965-00-954-3011
NSN 6220-00-081-6429
NSN 5998-00-735-7754
NSN 6105-00-205-0655
NSN 2925-01-489-1394
NSN 5950-00-467-7384
NSN 5975-01-604-1905
NSN 5975-01-051-3347