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 5915-01-602-9324
NSN 5920-00-189-0858
NSN 6135-01-205-5965
NSN 5996-01-372-2153
NSN 5935-01-350-3278
NSN 5960-01-478-2672
NSN 4140-01-044-6064
NSN 6105-00-296-5116
NSN 5950-00-221-7869
NSN 5835-00-170-5238
NSN 5910-00-189-7516
NSN 6620-00-451-8783