HiKOKI 6696944 Piston Pin for a wide range of compatible Hitachi and HiKOKI petrol-powered garden and engine tools. This replacement piston pin connects the piston to the connecting rod within the engine assembly and is suitable for replacing a worn, scored or damaged original component. Manufactured to the correct specifications for precise fit and reliable engine operation. Part 6696944 replaces previous part numbers 6686015 and 6686538.