Alternator Bolt Size/First Post

[Joe7232]

Hey guys, just want to start by thanking you in advance for any help that i can get. This is my first post(first of many to come) and usually i can find my info somewhere out there on the web, but this seems to escape me so maybe you guys can help.


I bought a Chevy performance 100 watt alternator and i can't seem to figure out the size of the bolt that goes in the top(smaller) hole.


Thanks again,

Joe