The Machine Key 3/8 x 3/8 x 5 Form B from G L Huyett is an oversize carbon steel key designed for secure shaft and hub connections. Measuring 3/8 inch in width and height with a length of 5 inches, this key is ideal for applications requiring enhanced strength and durability. The carbon steel construction ensures high tensile strength and resistance to wear, making it suitable for heavy-duty machinery and equipment. This machine key meets industry standards for performance and reliability, ensuring optimal operation in various mechanical systems.