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 6150-01-262-2277
NSN 5895-01-183-0770
NSN 5975-01-511-4537
NSN 6610-00-462-9843
NSN 5835-01-525-3220
NSN 4140-00-161-6327
NSN 6685-00-479-9305
NSN 6650-01-454-0684
NSN 6130-01-578-2234
NSN 6145-01-459-8150
NSN 5920-01-504-0732
NSN 6105-00-231-4370