Fully Threaded Rod Material Grade/Class Class 4.8 Material Steel Finish Black Oxide Thread Size M39-4 Overall Length 1 m Tensile Strength 55 000 psi System of Measurement Metric Thread Direction Right Hand Dimensional Standards DIN 976 Color Silver Maximum Temperature 302 Degrees F Minimum Temperature -58 Degrees F Minimum Yield Strength 30 000 psi Rockwell Hardness B67 Min