The Machine Key 3/8 x 1/2 x 3 Form B is an undersized key made from high-strength carbon steel, designed for reliable performance in mechanical systems. With dimensions of 3/8 inches by 1/2 inches and a length of 3 inches, this key is perfect for applications requiring precise fit and torque transmission. Its Form B design ensures compatibility with standard keyways, making it a versatile choice for various machinery. The carbon steel material provides excellent durability and resistance to wear, making it suitable for high-load applications. This key is essential for maintaining the integrity of rotating components.