This is an authentic manufacturer sourced replacement cotter pin. It is a standard hardware commonly used on a variety of Craftsman lawn and garden equipment. Depending on the model of your equipment it will be used in different locations to secure two parts together. Please make sure to check appropriate diagrams for correct application for this part. This metal cotter pin is sold individually. It is best to use pliers to remove or install this part.
OEM stands for Original Equipment Manufacturer. Simply put, this means that the company who made your appliance is also supplying the replacement part for it.