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 5945-00-309-5293
NSN 6620-01-586-3040
NSN 5910-01-369-0231
NSN 7035-01-642-2153
NSN 5990-01-485-0260
NSN 6240-01-160-7934
NSN 6105-00-012-8278
NSN 6145-00-279-4494
NSN 6620-01-250-7445
NSN 6240-00-372-4841
NSN 6150-00-580-0511
NSN 5920-01-360-8310