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 5895-00-766-9431
NSN 5950-01-407-7692
NSN 5996-01-018-6793
NSN 5920-01-461-3579
NSN 5999-00-078-9890
NSN 5905-01-194-4171
NSN 6610-01-052-0803
NSN 5920-01-109-3117
NSN 6130-01-004-8977
NSN 5996-00-816-5059
NSN 5930-01-420-0994
NSN 6610-01-038-9277