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 5930-00-537-4777
NSN 5855-00-198-3197
NSN 5990-00-170-4239
NSN 5999-01-445-5728
NSN 6645-01-014-0793
NSN 5960-01-331-3817
NSN 2925-00-891-9289
NSN 6135-01-557-9656
NSN 5920-01-146-4503
NSN 6110-01-650-0183
NSN 5998-00-784-6130
NSN 6650-01-101-2954