What is proper spot weld hole size

[moparjohnny]

3/16 or 5/8. Thanks to all who responds

 

[Propwash]

5/16" is suitable for our cars. 3/16" too small, 5/8" overkill.

 

[Pistol Pete]

5/16" is suitable for our cars. 3/16" too small, 5/8" overkill.

I concur. If you're doing a lot of them, get one of these.

http://www.amazon.com/Roper-Whitney-Jr-Punch-Kit/dp/B0015YPB2C

 

[5.7 hemi]

3/8!