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Peterson Fluid Systems stack adapter for spline drives includes a 2.250 in. guide washer and is machined from aluminum. The adapter is designed to stack on spline-drive components to achieve proper spacing and alignment; it ships as a kit that includes the matching 2.250 in. washer (part number referenced) for straightforward assembly in spline-drive pulley systems.
Peterson Fluid Systems Stack Adapter w/ 2.250 Washer
