Air filter stud?

[sabre67]

Hi anyone know off hand what the thread szie is on a Holley air cleaner center stud? Thanks for your help

 

[Ironracer]

1/4" 20, i believe

 

[sabre67]

Thank-you very much....Appreciated

 

[67Dart273]

Except for a few trucks, that was almost a universal thread for carb studs through the " 'Murican " years, as was 5/16 for the mounting studs.

 

[Oldmanmopar]

Holley style 4 corner carbs and race carbs are 5/16 18 all others are 1/4 20. They make and adapter for 5/16 to 1/4 so you don't have to drill your factory air cleaner. My son makes them in the shop also.

 

[sabre67]

Thanks for the replies

 

[67Dart273]

I THOUGHT somethin' was pickin at my old brain. Some of the older Ford / Autolite carbs (factory) were a 5/16 with a built in hex in the middle, then stepped down to 1/4 at the filter end
57-69 Autolite 2100/4100 Carburetor Stud for Air Cleaner [CAG-370971S] - $19.99 : Champion Carburetor, Your Carburetor & Parts Specialist