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 6320-01-290-5271
NSN 5935-01-106-8544
NSN 5925-01-084-8930
NSN 6240-01-371-3436
NSN 6130-01-127-6266
NSN 5895-00-905-8544
NSN 5990-00-660-8885
NSN 5960-00-723-2793
NSN 5915-01-258-4087
NSN 4140-01-023-8846
NSN 5945-01-169-7569
NSN 6610-00-055-8366