The dome goes to the outside. The best way to put them in is to take the round side of a ball pein hammar put it against the plug and hit the hammar with another hammar. Of coarse you need to put sealer in on the sides before hand , same as the other type.
I prefer the brass type plugs as well.
Posted on Sep 19, 2011, 4:42 PM from IP address 184.108.40.206