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 7035-01-466-6251
NSN 5975-00-762-1251
NSN 5960-00-631-8922
NSN 5835-01-020-0050
NSN 5935-01-386-3122
NSN 6145-01-420-3003
NSN 4140-01-196-5984
NSN 5925-01-350-3646
NSN 5935-01-469-7553
NSN 6105-01-112-9976
NSN 5930-01-069-0687
NSN 6620-01-420-6831