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 5925-00-243-5869
NSN 5990-01-529-7307
NSN 5925-00-150-1072
NSN 6610-01-478-9183
NSN 5965-00-543-1837
NSN 5998-01-469-3832
NSN 6610-00-005-4452
NSN 5915-00-911-6422
NSN 5965-01-133-7459
NSN 6620-00-451-1460
NSN 6220-01-357-3107
NSN 6220-01-104-9679