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 5990-01-032-3832
NSN 5920-00-398-0766
NSN 2925-00-646-6099
NSN 6135-01-451-2120
NSN 5910-01-387-8554
NSN 5990-00-079-5406
NSN 5925-01-057-7559
NSN 5975-01-470-1955
NSN 5999-00-843-6251
NSN 2925-01-015-2354
NSN 5910-00-528-9714
NSN 4140-00-343-8654