It is a genuine item that is supplied by the original manufacturer for use with Honda engines commonly installed on a variety of lawn and garden equipment. This is one of the flange nuts that are utilized to secure the exhaust manifold. A flange nut is designed to provide a tight fit and resist loosening. Replacing it is a simple task tha...Read moret should only require a wrench to remove and secure it. To ensure the correct location, please refer to the diagrams of your model. One durable metal nut-flange is included.