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 6220-00-364-1605
NSN 5975-00-138-9057
NSN 5999-01-415-5090
NSN 5915-00-267-9857
NSN 5985-01-646-7976
NSN 4140-01-161-8075
NSN 6110-00-886-6519
NSN 5935-00-285-2767
NSN 5945-01-524-9751
NSN 5998-00-624-6162
NSN 5855-01-464-3152
NSN 5960-01-632-6576