Swagelok QC6-KEY1 Quick-Connect Brass Adapter

Swagelok QC6-KEY1 is a brass quick-connect adapter in the QC6 instrumentation family, sized for 3/8 in tubing. The KEY1 designation identifies a black key color (K1) used to pair only with other QC6 parts bearing the same key designation, helping prevent cross-mating in multi-line assemblies. The brass body and stem are configured for 3/8 in tubing; sleeve outside diameter is 0.82 in (20.8 mm), with a body length of about 1.26 in (32.0 mm) and a stem length of about 1.10 in (27.9 mm). This keyed quick-connect supports fast, tool-free connections in instrumentation circuits, sampling lines, and test rigs where correct mating is critical, and it mates with compatible QC6 components carrying the K1 designation to ensure proper fit.