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 6320-01-029-4220
NSN 5990-01-218-5160
NSN 6105-01-023-2773
NSN 6220-00-736-0979
NSN 5905-00-528-4412
NSN 5930-00-612-7049
NSN 5905-01-226-9425
NSN 6645-01-572-7175
NSN 5915-00-957-9743
NSN 6145-00-880-8720
NSN 6320-01-212-8749
NSN 6220-01-242-6702