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 6110-01-286-2878
NSN 6220-00-193-7278
NSN 5915-01-025-1362
NSN 6220-01-025-6140
NSN 6105-01-401-5361
NSN 6145-01-416-5808
NSN 2925-00-844-2789
NSN 6650-01-212-3964
NSN 6150-01-281-4238
NSN 6105-00-508-1239
NSN 5965-01-039-8557
NSN 5960-00-450-6353