Woodruff Key Length 63/64 in Length Tolerance +0.007625/-0.002375 in Material Steel Material Grade/Class Grade 1018/Grade 1045 Finish Plain Height 0.4325 in Width 0.25 in Width Tolerance +0.000/-0.001 in Rockwell Hardness B90 Tensile Strength 72 000 psi Made in North America No Manufacturer Location Globally Sourced Key Shape Woodruff System of Measurement Inch Package Quantity 25