Model-A.org
The Place for Model-A Ford Carburetors
Model-A.org
The Place for Model-A Ford Carburetors
Main Bolt
- The Main bolt has 3/8-24 UNF (SAE) threads.
- The hex head width was 1/2" through 1928. Thereafter, it was 9/16".
- The Hex head thickness was 5/16" through mid 1930 and 1/4" thereafter.
- Bolts were Cadmium or plain finished.
- A lock washer is used with the bolt.
- Bolts were originally 3 inches long.
- When restoring carburetors I prefer to use 3-3/16" bolts, since casting threads are sometimes damaged for the first 1/4".