water pump Allen Head bolt size

[barkleydave]

I replaced my water pump block studs several years ago with allen head bolts.

Works great but now forgot what size they are?

Thanks

 

[Gary WA]

3/8-16

 

[barkleydave]

Thanks

 

[Bruce of MN]

The Bratton's site lists a lot of thread sizes for our reference:

https://www.brattons.com/water-pump-mounting-stud-nuts-set.html