This replacement part is a hex screw. It is a genuine replacement part made by MTD. This type of part is very common in different types of appliances and machines. Hex screws are important in holding parts together so that the user is able to operate the appliance smoothly.A new hex screw might be needed if the user notices that different parts of the appliances are loose or missing. It is possible for hex screws to become stripped over time and will need to be replaced. The repair for this screw should be simple and will most likely require a screwdriver and perhaps pliers if the previous screw is stuck in place. This is a genuine OEM replacement part. This part is sold individually. It is sourced directly from the manufacturer to ensure proper fit and long-lasting use.