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 7035-01-145-5059
NSN 6130-01-421-4773
NSN 5835-00-092-1136
NSN 5975-01-192-2908
NSN 6135-00-351-8606
NSN 6610-00-927-2279
NSN 6650-00-190-5158
NSN 5905-01-233-1953
NSN 5950-00-485-3734
NSN 5920-01-141-6885
NSN 5835-01-307-8954
NSN 6610-01-178-0333