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 4140-01-318-3087
NSN 6620-01-053-6650
NSN 5935-00-307-7713
NSN 6645-01-301-3066
NSN 5925-00-921-1171
NSN 6150-01-467-2016
NSN 6105-01-159-4038
NSN 6650-01-301-8806
NSN 5930-01-090-5337
NSN 5930-00-870-6352
NSN 6150-00-758-9420
NSN 5960-01-090-6979