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 6135-01-370-2599
NSN 5855-01-246-0342
NSN 6150-01-493-6469
NSN 7035-01-646-6718
NSN 6240-01-486-0255
NSN 5975-01-323-6361
NSN 5985-01-500-2580
NSN 5920-00-711-0767
NSN 2925-01-633-4048
NSN 6240-00-837-7653
NSN 5998-01-271-4255
NSN 4140-01-566-6614