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 4140-00-944-1011
NSN 5960-01-425-1454
NSN 5965-00-754-9059
NSN 5930-00-951-6531
NSN 6150-01-461-3112
NSN 6220-00-101-8799
NSN 6220-01-065-1387
NSN 6610-01-625-2926
NSN 6610-00-618-0772
NSN 5855-00-782-7714
NSN 6105-01-413-6995
NSN 6645-01-024-6447