This Form B Machine Key measures 1-1/4 x 1-1/4 x 5-7/8 inches and is made from 1045 carbon steel, designed as an undersized key for precise fit in keyways. Ideal for securing rotating components, this key provides reliable power transmission and prevents slippage in various mechanical applications. The 1045 steel construction ensures durability and resistance to wear, making it suitable for high-stress environments. Its dimensions meet industry standards, ensuring compatibility with a wide range of machinery. This machine key is essential for maintaining the integrity of mechanical assemblies and is perfect for both new installations and repairs.