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 5960-01-476-5686
NSN 6650-00-623-5969
NSN 6220-00-065-1393
NSN 5855-01-250-2421
NSN 5905-01-094-1386
NSN 5990-01-129-7701
NSN 5950-01-607-2020
NSN 5990-00-456-8793
NSN 5945-00-499-3934
NSN 5935-01-109-6569
NSN 5915-01-135-1073
NSN 6645-01-468-4990