head studs ?
#1
#5
A bottoming tap has a flat bottom instead of a tapered bottom. Bottoming taps are for cleaning out the threads in a hole, and normal taps cut new threads. You don't want to try and re-tap or cut new threads in the bottom of the hole, just clean them out and make sure that they aren't rounded over or getting in bad shape. If you try and cut new threads at the bottom, you will just compromise the existing ones.
Sean
Sean
#6
#8
A bottoming tap has a flat bottom instead of a tapered bottom. Bottoming taps are for cleaning out the threads in a hole, and normal taps cut new threads. You don't want to try and re-tap or cut new threads in the bottom of the hole, just clean them out and make sure that they aren't rounded over or getting in bad shape. If you try and cut new threads at the bottom, you will just compromise the existing ones.
Sean
Sean
#9