Fully Threaded Rod Material Grade/Class Grade B7 Material Steel Finish Black Oxide Thread Size M39-4 Overall Length 1 m Tensile Strength 125 000 psi System of Measurement Metric Thread Direction Right Hand Color Silver Material Quality Standards ASTM A193 Maximum Temperature 302 Degrees F Minimum Temperature -58 Degrees F Minimum Yield Strength 105 000 psi Rockwell Hardness C35 Max