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 5855-00-922-6459
NSN 5996-01-437-6577
NSN 5905-01-481-1605
NSN 5905-01-432-8072
NSN 6650-00-397-0372
NSN 6130-00-253-1304
NSN 6220-01-334-0613
NSN 5998-01-094-7043
NSN 5990-00-644-3365
NSN 6105-01-634-0322
NSN 4140-00-100-4563
NSN 5855-01-075-1292