<p>Machine Key, Undersized, Metric, Square End Type, Steel, Plain Finish, 8mm Length, 4mm Square, +0.30mm Thickness Tolerance, -0.20mm Length Tolerance, Tensile Strength 91,000 PSI, Rockwell Hardness C15, Holds Pulleys and Gears on Transmission Shafts,Package 25</p> <p><br /><b>Features</b></p> <ul> <li>Application: Holds Pulleys and Gears on Transmission Shafts</li> <li>Finish: Plain</li> <li>Item: Machine Key</li> <li>Length: 8mm</li> <li>Material: steel</li> <li>Tensile Strength (PSI): 91,000 psi</li> <li>Type: Undersized</li> <li>End Type: Square</li> <li>Square: 5/32&quot;</li> <li>Rockwell Hardness: C15</li> <li>Length Tolerance: -0.20mm</li> <li>Thickness Tolerance: +0.030mm</li> </ul> <p></p>