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 5905-01-447-8122
NSN 5835-01-303-6563
NSN 6620-01-535-1230
NSN 5910-01-167-7736
NSN 4140-01-575-7253
NSN 6220-00-166-9795
NSN 4140-01-538-3623
NSN 5855-00-610-4052
NSN 5960-00-246-4623
NSN 6105-01-597-8251
NSN 7035-00-509-7082
NSN 6105-01-382-7299