View Full Version : Tapping aluminum question

02-27-2005, 10:04 PM
First time working with metals, so here is the newbie question i have. Do i need to tap both peice of aluminum? (see picture)

02-27-2005, 10:15 PM
No, you should drill a clearance hole in the first piece the bolt passes through, and tap the threads in the second part. Otherwise, your bolt will not be able to tighten one part against the other.