Yep short taps should be fine. Your just looking to knock one side in so the other pops out. You can even use an extension on the socket to get a little leverage if space permits. I use the brass ones and the black RTV sealer should be fine. I feel the brass is a little more forgiving being softer. I'm not certain about the materials but I know brass was commonly used in marine applications. Steel for automotive. I'm thinking corrosion but again not an expert on the subject. The numbers might have changed since I bought mine so go with the ones you found. I might have even jotted them down wrong possibly......would not be the first time LOL, G.