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