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 5895-01-634-0630
NSN 5999-01-240-0254
NSN 5996-01-398-7266
NSN 5996-01-357-1967
NSN 6320-00-110-8005
NSN 4140-01-241-2197
NSN 5935-00-925-7276
NSN 5855-01-472-2302
NSN 5985-00-323-1317
NSN 6105-01-386-6694
NSN 7035-01-408-6802
NSN 6650-00-857-2260