The Machine Key 1/8 x 1/8 x 3 Form B is an undersized key made from high-strength carbon steel, designed for secure engagement in various mechanical assemblies. Measuring 1/8 inch in width and height, and 3 inches in length, this key is ideal for applications requiring precise alignment and torque transmission. Its durable construction ensures longevity and reliability in demanding environments. This machine key is compliant with industry standards, making it suitable for use in a wide range of machinery, including motors and gear systems.