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 7035-01-523-5550
NSN 6240-01-245-9788
NSN 6240-00-172-8451
NSN 5915-00-972-9916
NSN 6220-00-707-5044
NSN 5855-01-503-6973
NSN 5985-01-543-9507
NSN 6150-01-441-9621
NSN 6110-00-984-3291
NSN 5895-01-462-1911
NSN 6220-01-616-9805
NSN 5975-00-827-0261