MS3106F18-4S is a straight plug connector conforming to MIL-DTL-5015 and MIL-5015 standards, featuring a shell size 18 with environmental resisting (F-class) design and strain relief capability. The connector is equipped with a 1.1250-18NEF thread (Class 2A) on the mating end and 1.0000-20UNEF thread (Class 2A) on the cable end, with a maximum overall length of 1.938 inches and a cable clearance of 0.531 inches. The connector incorporates silver-plated copper alloy contacts for maximum corrosion resistance and low millivolt drop, paired with resilient neoprene inserts that provide outstanding moisture barrier and high dielectric strength. This connector is widely used in military, aerospace, and industrial applications requiring reliable environmental sealing and vibration resistance in harsh operating conditions.