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 6110-01-568-7366
NSN 5855-01-020-7982
NSN 5925-01-133-9489
NSN 6645-00-099-6913
NSN 6145-01-654-6699
NSN 5990-01-460-6390
NSN 6650-01-160-1110
NSN 6105-00-393-2489
NSN 5915-01-155-2644
NSN 4140-01-484-8340
NSN 6650-00-316-4889
NSN 5996-01-340-8813