Special counter sunk screws for the butterfly valve on the Italian-made Weber DCOE carburetors.
Please note that these screw are suitable for one-time-use ONLY!
After you have secured the throttle (or butterfly) valves in place, these screws need to be peened to avoid them from becoming undone.
Once peened, they can NOT be used again!
Please note that the Spanish-made DCOE's use screw S57392022.
Required quantity per carburetor: 4
This is item number 35 in the drawing.