The MTSS156-7-C is a MAS-CON Series 156 connector header featuring a 3.69 mm pitch and 180° unbreakable construction with integrated locking and polarization features. The connector employs square pin style 5 with a nominal pin diameter of 0.156 inches (3.96 mm) and supports up to 12 positions with configurable dimensions based on position count. The design allows for 3 inches maximum twist in either direction, providing mechanical robustness and strain relief. With its locking mechanism and polarization, this connector ensures secure mating and prevents incorrect insertion in applications requiring reliable interconnection. The MTSS156-7-C is commonly used in industrial control systems, instrumentation, and equipment requiring durable, keyed connector solutions.