The 174057-4 is a 4-position cap housing assembly for the .040 MULTILOCK connector system, engineered for wire-to-wire automotive applications. This connector accommodates applicable wires in the 0.3–0.5 mm² range (AWG 22–20) and features housing materials constructed from PBT (polybutylene terephthalate) for both the cap and plug components. The connector operates with a 2.5 mm contact centerline spacing and integrates a double-lock mechanism to ensure complete and secure contact insertion. The assembly is designed for easy handling and provides protected contacting points on receptacle contacts. This connector is widely used in automotive powertrain systems, safety and security systems, and convenience applications where reliable wire-to-wire connections are required.