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 5905-00-884-9893
NSN 5950-00-818-6956
NSN 6610-01-189-3001
NSN 6110-01-200-8237
NSN 5975-01-628-5952
NSN 5915-00-896-6918
NSN 5855-01-400-1590
NSN 5895-00-581-3969
NSN 5960-00-449-1769
NSN 5915-00-546-0870
NSN 5835-01-209-6410
NSN 2925-01-564-2617