The Trailer Hub Cap for Steer Axle with Side Fill Plug is a high-quality replacement part. This hub cap, which replaces Stemco 343-4009, includes a side fill plug for easy maintenance. With OEM 3434009 this durable hub cap ensures a perfect fit and reliable performance for your trailer. Whether you need a single hub cap or additional components, this product has you covered. The box has some damage, but the cap and gasket are in excellent condition.