Machine Key Length 4 in Length Tolerance +0.000/-0.100 in Material Steel Material Grade/Class Ungraded Finish Plain End Profile Tapered Gib Width Tolerance +0.000/-0.004 in Head Height 1 1/4 in Key Type Bilateral Tensile Strength 64 000 psi System of Measurement Inch Key Shape Gib Head Height 7/8 in Width 7/8 in Rockwell Hardness B85 Made in North America Yes Manufacturer Location Made in USA Pack Size Small Pack