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 5999-01-341-9201
NSN 6105-01-283-5615
NSN 5999-01-197-7799
NSN 5999-01-462-0590
NSN 5945-00-833-6031
NSN 2925-01-469-8229
NSN 5895-01-481-1651
NSN 5915-01-084-1883
NSN 6650-00-221-7119
NSN 6685-00-183-0351
NSN 6135-01-161-3914
NSN 6220-00-543-4416