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 4140-01-463-2910
NSN 5835-00-302-5296
NSN 5985-01-157-8894
NSN 5975-01-094-6806
NSN 5999-01-325-2864
NSN 5855-00-944-0949
NSN 6320-01-397-9995
NSN 5975-01-050-1253
NSN 6105-00-510-2514
NSN 5925-01-364-8334
NSN 5998-01-497-0287
NSN 6320-01-054-3046