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 5855-00-688-9954
NSN 6240-01-176-0223
NSN 5960-01-239-4314
NSN 5999-00-276-9299
NSN 5975-00-177-8022
NSN 6220-00-035-6736
NSN 5990-00-153-0055
NSN 5960-01-015-8655
NSN 5930-00-905-6459
NSN 5855-01-658-1044
NSN 5996-01-167-9234
NSN 4140-01-312-1888