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 5915-01-386-4402
NSN 5985-00-765-1421
NSN 6650-01-253-1134
NSN 6150-01-556-2177
NSN 5835-00-523-0736
NSN 5975-01-527-9037
NSN 5930-01-425-1352
NSN 5920-01-431-7617
NSN 5910-00-859-1778
NSN 5990-01-411-5930
NSN 6150-00-251-7608
NSN 6105-00-339-8366