PCL AC21CF05 Airflow Coupling Female Thread RP1/4

Amazon

Airflow Coupling Female Thread Rp 1/4 Compatible with the Standard range of Adaptors Steel Construction - robust and hardwearing, ideal for use in the engineering/workshop environment Positive locking mechanism Designed for Fixed applications, Manufacturer: PCL

Zoro Tools

These quick release couplings have a double action feature which makes them ideal for trailing hose applications in garage and tyreshop environments (e.g. portable air tools and PCL hand held tyre inflation equipment).