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 5915-01-123-6619
NSN 6620-01-564-9503
NSN 5945-01-268-0706
NSN 5935-00-942-2713
NSN 6610-01-512-2025
NSN 6105-01-464-4251
NSN 5996-01-062-0807
NSN 6220-01-324-0343
NSN 2925-00-163-9016
NSN 5960-01-474-4843
NSN 6110-00-433-5777
NSN 5905-01-580-2368