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Hi Jeff,
If you are talking about sheet metal screws, they are
harder 'en hell and I've ruined many a bit trying to drill them out. I
finally settled on using a rotary file that is easy to control. Especially
in a small hand held tool like a Dremel. However, I use my regular 3/8th
inch drill or an angle grinder. Just have to work very careful with the
larger tools. I've had some success, sometimes, using vice grips to grasp
the head of the screw, but it works so seldom that I only attempt this technique
for one or two screws.
For the larger belly pan rivets, I drill them completely
through with a bit smaller than the rivet body. Then, I cut the head off
with a sharp chisel. The aluminum sheet usually pops loose when the head
comes off. I can remove the body from the rear when the panels are
dropped. I bought pop rivets with SS shanks and have now decided not to
use them as they would be nearly impossible to remove later. I'll use only
aluminum pop rivets with aluminum shanks. No sense making the job harder
in the future by using pop rivets with steel or SS shanks. The rationale
for using steel or stainless shanks is to get
I bought some rivets from Airmark Tools, but the best
belly pan rivets came from an Airstream dealership. The heads are about
1/2 inch in diameter. The rivets in the belly take a lot of abuse and I
think the heavier rivets are a better replacement. If you are interested
in this type of rivet, let me know and I'll get the measurements.
'69 Safari, Joy
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