Mixture Screw for (Solex) Zenith INAT carburetors.
Special, tapered, screw to set the idle mixture on the Zenith INAT series carburetors.
Required quantity per carburettor: 1
This is Number 2 in the drawing.
Please note that the Zenith INAT was also produced as Solex INAT.
The Solex INAT can be found HERE.