This component is a precision-machined, flanged cover plate that houses an essential rotating shaft oil seal. It is commonly referred to as a Carrier Seal Assembly or Bearing Carrier Cover. Its primary function is to secure the oil seal in place and bolt securely to a component housing (like a differential carrier, gearbox/lower unit, or engine block) to prevent oil or grease leakage and protect the internal bearing from water and contamination. The green/teal color suggests a marine or heavy-duty industrial application.