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Introducing Boston Gear's Jaw Coupling Hub, the ultimate solution for power transmission needs. Made from top-grade steel, this coupling hub is designed with a 3-jaw insert design that provides exceptional gripping force and no-backoff performance in high-stress environments. With a bore diameter of 3/8 inches and keyway size type of 3/32 x 3/64 inches, the product offers outstanding stability and precision. The perfect fit for conveyor systems, manufacturing machines, and other power transmission applications, this versatile hub ensures reliable, durable, and efficient performance. Say goodbye to downtime, maintenance, and replacement costs with Boston Gear's Jaw Coupling Hub. Boost your productivity and invest in a solution that delivers unmatched quality and value!