1-2157480-4 is a sealed AMPLIMITE D-Subminiature plug connector from TE Connectivity's Series 109 standard density line, featuring shell size 4 with 37 positions and supplied without contacts. The connector is designed to meet MIL-DTL-24308 standards and provides IP67 environmental sealing with grommet and interfacial seal protection, operating over a temperature range of -55°C to +125°C. It features a cadmium-plated steel shell, glass-filled polyester insert, fluorosilicone rubber sealing grommets, and stainless steel retention clips. This connector is ideal for aerospace, defense, and marine applications where water and dust ingress protection is critical in harsh environments.