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A spring pin is a hollow, split dowel pin that exerts uniform outward pressure when fitted into a nut or shaft hole. Also called a roll pin, the spring pin withstands side loads and rotational friction, making it ideal for securing shaft and axle connections. Spring pins are also easy to insert and remove. For higher load applications where vibration and shocks are a problem, use a coiled spring pin. Secure machinery and components quickly and easily with Grainger spring pins.