A Spacer is a fastener that is used to create space between two components. They are also used to provide positioning assistance between components. The size and shape of a spacer can vary depending on its intended use, but they are manufactured to very tight tolerance to ensure accurate spacing between components.Attributes:• Protects components from damage or wear by preventing them from rubbing against each other• Manufactured to precise specifications and are built for durability, and reliabilityApplications:A Spacer is used in a seawater heater exchanger to create a controlled gap between the engine coolant tubes and the seawater channels. This gap allows for efficient heat transfer while preventing seawater from directly contacting the tubes.