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 6110-01-538-3876
NSN 6620-00-006-6418
NSN 4140-00-269-3189
NSN 6135-01-071-4923
NSN 6105-00-488-9418
NSN 6645-01-595-7659
NSN 5945-00-933-3047
NSN 6650-00-526-6792
NSN 6240-00-052-9889
NSN 6110-01-328-5258
NSN 5990-01-489-0366
NSN 6150-01-579-1053