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 5999-01-408-6213
NSN 5935-01-550-6331
NSN 5905-00-239-3453
NSN 5910-00-824-0188
NSN 5960-00-032-9715
NSN 6150-00-942-2883
NSN 5895-01-181-5471
NSN 6320-00-937-5625
NSN 6650-00-464-6395
NSN 5920-01-463-8484
NSN 5960-00-204-7506
NSN 5965-01-447-8165