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 6240-00-738-8334
NSN 5920-01-181-5248
NSN 5960-01-579-1661
NSN 5998-00-192-0372
NSN 5920-00-271-3217
NSN 6220-00-927-0543
NSN 5965-00-417-8182
NSN 5935-01-461-1701
NSN 5985-01-319-5129
NSN 6135-01-425-7434
NSN 5996-01-400-3558
NSN 5965-00-433-6181