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 7035-01-619-7867
NSN 2925-01-471-3365
NSN 6105-01-514-7310
NSN 5945-00-699-9797
NSN 6150-00-735-6840
NSN 5990-01-251-0234
NSN 5945-01-575-5058
NSN 5910-00-829-6877
NSN 5999-00-143-6978
NSN 5835-01-228-0178
NSN 6610-00-641-3015
NSN 5920-01-436-1885