Solenoid valve screw M4x10
The product on this page is a Allen head screw for attaching a solenoid valve to a other surface. This type is a M4x10mm. It is a stainless-steel bolt according to UNI 5931 - DIN 912 - ISO 4762
You will only need this type of Allen head screw to attach the flanged solenoid valves to a flat surface.
This type of Allen screw is used in a lot of espresso...
€0.63