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 6135-01-479-4020
NSN 5835-01-323-2581
NSN 6110-01-520-4858
NSN 6650-00-707-1417
NSN 6620-00-915-0868
NSN 6320-01-441-2438
NSN 5920-00-204-8125
NSN 5960-00-027-6997
NSN 6105-01-207-0152
NSN 5855-00-337-3679
NSN 5996-00-333-5182
NSN 5960-00-711-4645