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 6650-00-877-1797
NSN 6110-01-012-4227
NSN 6650-01-383-9835
NSN 6110-00-977-2471
NSN 5920-01-593-1252
NSN 6610-01-564-7464
NSN 2925-00-163-4543
NSN 6650-01-504-4745
NSN 5950-00-874-3723
NSN 7035-00-908-4933
NSN 7035-01-398-9581
NSN 2925-00-468-5273