The Key 5/16 x 5/16 x 1-1/4 Form B is a crucial component for securing rotating machinery parts. Made from carbon steel with a Z3 finish, this key offers excellent strength and corrosion resistance. Its dimensions of 5/16 inch square and 1-1/4 inch length make it suitable for various applications, including automotive and industrial machinery. The Form B design ensures a snug fit in keyways, providing reliable torque transmission. This key meets industry standards for quality and performance, making it an essential choice for maintenance and repair tasks.