006 in, Thickness Tolerance +/-0.0005 in, Keyway Width 3/16 in, Keyway Depth 1/16 in, Round Shim Type Arbor Spacer, Material Steel, Finish Plain, Temper Full Hard, Material Grade/Class Ungraded, Rockwell Hardness B90, Tensile Strength 80,000 psi, Manufacturer Location Made in USA*, Package Quantity 10.011/-0.002 in, Thickness 0.