The M4 x 4 x 16 Form A Key from G L Huyett is a precision-engineered component designed for secure mechanical connections. Made from high-quality carbon steel, this key features a size of M4 with a length of 16 mm, ensuring compatibility with various applications. Its plain finish provides a clean look while maintaining durability. Ideal for use in machinery and equipment where reliable torque transmission is required, this key meets industry standards for performance and quality, making it a dependable choice for engineers and manufacturers.