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 5960-01-064-7121
NSN 5996-01-399-6677
NSN 6650-01-207-0829
NSN 5835-00-707-6266
NSN 6645-01-654-9639
NSN 5990-01-503-0194
NSN 5975-01-198-9013
NSN 5835-01-471-5848
NSN 6110-01-472-1963
NSN 2925-01-424-0235
NSN 5985-01-046-5184
NSN 6220-00-445-1091