What is the formula to determine how long a rivet shank has to be to form a round head?
My job is 0.131 thick and I want a round head using solid alumunim rivets.
For small (under 7/16" body diameter) rivets, the formula is 1-1/2 x rivet body diameter + material thickness.
So in your case it's 1-1/2 x rivet body diameter + 0.131.