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 5915-00-181-5876
NSN 6105-01-449-1046
NSN 6320-01-056-1164
NSN 5915-00-064-9096
NSN 5996-00-153-3216
NSN 6620-00-611-9935
NSN 6650-01-420-6572
NSN 6240-01-436-9132
NSN 5998-01-424-0321
NSN 5975-00-636-4910
NSN 7035-00-513-9764
NSN 6150-00-804-5036