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 6240-00-422-1278
NSN 2925-00-172-9264
NSN 5835-01-558-9444
NSN 6135-00-437-5182
NSN 5950-00-436-7091
NSN 5930-00-948-9630
NSN 5930-00-104-8619
NSN 6320-00-886-9771
NSN 6150-00-898-5258
NSN 6130-01-343-5026
NSN 5950-01-357-6515
NSN 5855-00-256-5562