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 4140-01-279-0556
NSN 5910-00-235-9461
NSN 5990-01-571-3593
NSN 5920-01-200-3867
NSN 5915-00-081-7815
NSN 6110-01-464-3717
NSN 6150-00-278-1294
NSN 2925-01-567-8027
NSN 5945-00-795-4824
NSN 6240-00-031-3112
NSN 5990-01-012-8062
NSN 5915-01-342-4345