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 2925-00-758-9931
NSN 5835-00-690-8898
NSN 5905-01-129-6538
NSN 2925-01-016-3111
NSN 6685-01-151-2178
NSN 6620-00-278-7313
NSN 5915-00-866-0585
NSN 6135-00-100-0485
NSN 5950-01-062-8470
NSN 6135-01-469-6429
NSN 5990-00-809-5286
NSN 4140-00-857-3202