Normally, the problem with going up a size is the head gets bigger, too. But we solved that conundrum by using the same size and shape head on both our 1/8" rivets and on our 5/32" rivets. They both have a head diameter of .312 inches. Cool, huh? So you can order either diameter and know the head will be the same as on your Airstream's original rivets.
We are currently selling our solid rivets in the soft 1100F aluminum alloy used on most Airstreams. We are offering them in 1/4" length, 3/8" length and 1/2" length. To determine the correct length, add up the thickness of your material plus the clinch allowance. The clinch allowance is the the amount of the shaft that needs to stick through the back of the material before you start bucking it.
1/4" rivets are typically the correct length for clinching up to two sheets of aluminum. If you need to clinch more material, choose the 3/8" or 1/2" rivets and cut to length for your application using our rivet cutters.
Proper Rivet Length = total thickness of all layers being clinched + clinch allowance.
1/8" Rivet Working Specs
Ideal clinch allowance = .187"
Ideal shop head diameter = .187"
Correct drill bit for preparing work hole: #30
5/32" Rivet Working Specs
Ideal clinch allowance = .234"
Ideal shop head diameter: .234"
Correct drill bit for preparing work hole: #21