Arbor Spacer Inside Diameter 0.375 in Outside Diameter 0.625 in Inside Diameter Tolerance +0.011/-0.000 in Outside Diameter Tolerance +/-0.002 in Thickness 0.007 in Thickness Tolerance +/-0.0008 in Keyway Width 1/8 in Keyway Depth 3/64 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