956A1005G02 is a precision aerospace component, compliant with AS9100D quality standards and FAA/EASA regulations, designed for the pneumatic systems of large commercial aircraft.

It acts as a pneumatic control valve piston seal ring, forming a tight, pressure-stable seal between the valve piston and cylinder bore. This seal ensures the valve can accurately regulate the flow and pressure of compressed air, controlling the operation of pneumatic components such as brake actuators or door control systems, avoiding air leakage that would reduce component responsiveness, cause unsmooth system operation, or affect flight and ground operation safety.

Made from wear-resistant, pressure-resistant fluorosilicone rubber, it operates stably at -45°C to 240°C, and resists long-term contact with aviation compressed air. Weighing 0.06kg, it enables fast MRO replacement, a critical component for pneumatic system reliability.