Woodruff Key Length 31/64 in Length Tolerance +0.006625/-0.003375 in Material Steel Material Grade/Class Grade 1018/Grade 1045 Finish Plain Height 0.0469 in Width 0.0625 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 100