MS3112E18-32S is a MIL-C-26482 Series I box mounting receptacle connector featuring shell size 18 with 32 contacts, classified as MS service class E. This connector is designed for solder termination using the KPT02 configuration and includes a polarizing groove for proper mating alignment. The receptacle has a maximum shell diameter of 1.123 inches (28.52 mm), a maximum length of 1.125 inches (28.58 mm), and mounting holes with a 0.120 inch (3.05 mm) diameter. The connector does not accommodate a backshell and is suitable for applications requiring reliable, high-density interconnections in military and aerospace environments where MIL-C-26482 compliance is mandatory.