The Machine Key 5/16 x 5/16 x 6 Form B is an undersized key made from durable carbon steel, designed for secure engagement in mechanical assemblies. With dimensions of 5/16 inch in width and height, and 6 inches in length, this key is ideal for applications requiring precise alignment and torque transmission. Its robust construction ensures longevity and reliability in demanding environments. This machine key complies with industry standards, making it suitable for use in a wide range of machinery, including motors and gear systems.