Tensile strength is 125,000 PSI minimum. Medium carbon steel with black oxide finish. Most sizes have wrench flats. Can be used with T-nuts, flange nuts, and flat and spherical washers.
Warning:This product may expose you to chemicals including Nickel, Chromium, or Lead, chemicals known to the State of California to cause Birth Defects and/or Cancer. For more information go to www.P65Warnings.ca.gov