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 4140-00-459-9045
NSN 6135-00-998-5884
NSN 5915-00-285-2213
NSN 6650-01-364-4616
NSN 6130-01-343-1221
NSN 6145-00-174-9344
NSN 5935-01-444-1320
NSN 5960-00-011-9315
NSN 6685-00-322-3968
NSN 5905-01-344-3217
NSN 4140-01-189-7899
NSN 5965-01-312-1630