Preci-Dip Rectangular Connectors - Headers, Specialty Pin 150-10-640-00-106161 are a type of electrical connector used to connect two or more wires or circuits together. They are designed to provide a secure and reliable connection between two or more components. These connectors are made from high-quality materials and feature a 2.54mm pitch, 40-position, and solder tail SMD termination. They are suitable for a wide range of applications, including automotive, industrial, and consumer electronics. The connectors are RoHS compliant and are available in a variety of colors. They are easy to install and provide a reliable connection for a variety of applications.