This manufacturer-certified Hex Bolt, measuring 5/16-18 x .75 inch, is a gold, metal, individually sold bolt. It can be installed using a wrench or socket and torque wrench, by tightening to manufacturer specifications. If damaged (likely due to fatigue) the threads will be stripped, or the ends rounded off. If broken or missing, it should be replaced. Refer to your owners manual or model number to ensure you are purchasing the correct part.