FESTO Pressure Hoses & Connectors Screw fastener 612281 - FESTO 177684, The FESTO 177684 CQ-1/2-15 is a screw fastener designed for secure connections in pneumatic systems. With a pipe diameter of 15 mm, it ensures reliable and efficient performance. Typically used in industrial automation, it facilitates seamless integration of pneumatic components. FESTO 177684 Screw Fastener 15mm Pipe high flow plug-in gland