The Machine Key 1/4 x 1/4 x 1-9/16 Form B is a high-quality component made from carbon steel, designed for secure power transmission in mechanical assemblies. With a cross-section of 1/4 inch and a length of 1-9/16 inches, this undersized key fits precisely into keyways, ensuring a tight fit between rotating parts. Its robust construction meets industry standards, making it suitable for various applications, including motors and gear assemblies. This key is essential for maintaining the integrity and efficiency of machinery.