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 5915-01-279-1717
NSN 5999-01-010-1995
NSN 5920-00-159-8582
NSN 5895-01-030-4112
NSN 5835-01-235-5061
NSN 5835-01-124-2398
NSN 5996-01-316-4275
NSN 5999-01-266-4622
NSN 5999-01-147-5317
NSN 6650-01-640-9370
NSN 6650-00-078-5773
NSN 6685-00-995-4231