Join Date: Oct 2006
Thanked 37 Times in 25 Posts
When you bottom tap for the studs you do cut more threads in the block. You only cut an extra three or four. Stock the threads taper out, when you bottom tap you can get more threads in the block making the studs and block able to hold more.
On the top side of the stud you'll have the same number of threads no matter where the nut is on the stud as long as you have the nut full. So if you bottom tap you can shift the whole stud deeper into the block and get a better bite.