Car, truck, van connector with safety lock, Quick Connectors Factory for fuel line
https://www.alwaytec.com/product/
Automotive fuel quick connectors and assemblies are used to connect the fuel lines in a vehicle's fuel system. The main types of automotive fuel quick connectors and assemblies include:

Push-to-Connect Connectors: These connectors are easy to install and use, as they simply push onto the fuel line to create a secure connection. They are commonly used in automotive applications and can be found in both plastic and metal materials.