The PXT45B 3 7/16 XT Bush w/Bolt by Precision Inc is specifically designed for pulley systems requiring keyed components. Measuring 3 7/16 inches, this XT bush ensures a secure fit, enhancing the performance of your machinery. Its durable construction is built to withstand the rigors of industrial applications, making it a reliable choice for manufacturers. This bush complies with industry standards, ensuring safety and efficiency in operation. The included bolt allows for straightforward installation, making it a practical addition to your maintenance toolkit. Optimize your pulley system with the PXT45B bush for improved functionality.