So I picked up a couple of Rochester B’s at the Pete swap meet at Texas motor Speedway this past weekend. Both are complete, and appeared to be in pretty good shape except that on one of them the 4 screws that hold the airhorn to the fuel bowl are buggered up and I’d like to replace them at the same time I rebuild the carb. I’ve been told they are “Fillister” screws, but I don’t know any more than that. Can someone please tell me the size and thread count? I can figure out the length.

Thanks!


Chuck
1950 Chevy 1/2 ton (all original)
1951 Chevy 1/2 ton (future streetrod)
1941 Chevy coupe
1938 Chevy coupe streetrod