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 6130-01-212-3832
NSN 6240-01-130-1505
NSN 5965-01-006-8613
NSN 5920-01-107-6614
NSN 2925-01-629-9416
NSN 5999-01-465-9954
NSN 6650-01-139-9534
NSN 6110-00-146-2114
NSN 5910-00-108-5375
NSN 5835-00-073-0790
NSN 5910-00-034-1853
NSN 6105-00-707-5962