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 5895-00-983-0739
NSN 4140-00-552-7370
NSN 5930-00-028-6949
NSN 6135-01-255-9129
NSN 5915-01-178-0238
NSN 6610-01-498-4063
NSN 6110-00-324-8415
NSN 6130-01-310-4939
NSN 6650-00-981-9501
NSN 5999-01-643-6052
NSN 5985-01-378-7359
NSN 6220-00-179-7804