Swagelok QC6-KEY6 Quick Connect Fitting

Swagelok QC6-KEY6 Quick Connect Fitting is a keyed quick-connect assembly in Swagelok’s QC6 family, designed to deliver fast, push-to-connect mating for instrumentation lines with repeatable, leak-tight performance. The QC6 family comprises brass or stainless-steel bodies and stems that mate with color-coded keys to prevent cross-mating in complex manifolds. A brass body version, B-QC6-B-6PF, provides a 0.5 Cv flow coefficient and a 3/8 in. female NPT connection, making it suitable for instrumentation lines that require a compact 3/8 in. interface. Stainless steel options include SS-QC6-B-6PF, also with a 3/8 in. female NPT, and for stem assemblies with an integrated valve, SS-QC6-D-600K3 (Green Key), which shows a 3/8 in. configuration and valve feature. The keyed design ensures mating only with the correct corresponding plug, aiding safe operation in test setups and process environments. This particular KEY6 designation places the part in Swagelok’s keyed QC6 lineup, helping prevent misconnection when multiple Quick Connects are used together. In practice, users choose the QC6 family for instrumentation connections requiring reliable sealing, corrosion resistance (brass or stainless variants), and compatibility with Swagelok tube fittings and nuts, without sacrificing ease of use during maintenance or calibration tasks.