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 6110-00-533-4334
NSN 6130-01-252-8823
NSN 5960-01-388-1988
NSN 5925-00-113-0017
NSN 6135-01-238-2878
NSN 5855-00-928-1912
NSN 5950-00-004-2086
NSN 5945-00-420-1273
NSN 6220-01-537-5288
NSN 5985-00-397-7296
NSN 5835-01-318-9068
NSN 6110-00-909-5628