The E20055 D Sub Back Shell is a protective housing designed for use with D-sub connectors in King packaging machines. This back shell provides essential protection to the connector, shielding the 37 contacts from dust, debris, and other environmental factors that could impact the connection's performance. In addition to protection, the E20055 D Sub Back Shell helps ensure that the connector remains securely fastened, maintaining stable signal transmission between machine components. This component is crucial for high-demand environments like pharmaceutical and packaging production, where maintaining the integrity of electrical connections is critical for smooth machine operations.