This M5x0.8 x 20mm long* screw secures the top cover on several Weber carburetor models. This is the same flat fillister ("cheese head") screw supplied by Weber on new carburetors. These screws only seem to go missing when you're in a hurry, so carrying a few spares is cheap insurance!
32/36 DGV, DGV5A, DGAV, DGEV Top Plate (6 required per carburetor)*
38 DGAS, DGES Top Plate (6 required per carburetor)
40 DCOE, 45 DCOE, 50 DCO, 55 DCO Top Cover (5 required per carburetor)
40 DCOE, 45 DCOE, 50 DCO, 55 DCO Bottom Bowl Cover (4 required per carburetor)
Sold individually. Each screw includes a captive spring washer.
* Note: One hole on the 32/36 DGV/DFV is blind, and this screw must be shortened slightly to fit without bottoming. Five of the holes on this carburetor are through holes, so they can use any length screw.