Swagelok QC6-KEY6 Stemless Quick Connect Fitting

Swagelok QC6-KEY6 Stemless Quick-Connect Fitting is a stemless quick-connect in Swagelok’s QC6 family, designed for fast, repeatable instrument connections without a valve. The model's yellow-keyed interface (KEY6) mates with the corresponding QC6 stems and bodies to prevent cross-mating, while a white body designation helps identify the specific keyed configuration. This stemless design means there is no internal stem or valve in the connection, enabling rapid make-and-break connections in instrumentation lines with minimal spillage. Typical applications include process instrumentation, analytical sampling lines, gas and liquid sampling manifolds, and pneumatic control networks where frequent connections are advantageous. The QC6 family supports multiple materials and sizes; configurations exist in stainless steel and brass variants, with common connection sizes such as 3/8 in and 10 mm documented in the QC6 catalog, and flow characteristics described by the series Cv values that vary by exact model. When selecting a QC6-KEY6, ensure compatibility with your mating QC6 body and the rest of your system to maintain leak-tight performance under your operating pressures and temperatures. Color coding and keyed interfaces help ensure correct mating across paired components, reducing the risk of misconnection in high-density instrumentation assemblies.