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 4140-00-012-3506
NSN 5925-00-459-0827
NSN 5965-01-601-8507
NSN 6145-01-049-2360
NSN 6650-01-161-1624
NSN 5915-00-212-1364
NSN 5925-00-313-6049
NSN 6650-01-049-5361
NSN 6240-01-088-0389
NSN 6130-00-187-0211
NSN 6240-01-657-0501
NSN 5855-01-078-4180