MS3106A20-15S is a MIL-DTL-5015 standard cylindrical straight plug connector designed for reliable electrical interconnections in demanding environments. This Class A connector features a shell size 20 with insert arrangement 15, providing 7 contacts of size 12 for versatile wiring configurations. The connector utilizes a 1.2500-18NEF coupling thread and features aluminum alloy shell construction with electrically conductive cadmium plating and olive drab chromate after-treatment for corrosion resistance. Contacts are machined from copper alloy for maximum current carrying capacity and low millivolt drop, available in both crimp and solder versions. This connector is commonly used in military, aerospace, and industrial applications where environmental resistance and reliable performance are essential.