Hi Harry,

A couple years ago, I had a broken leaf in my spring pack replaced by a business not far from me, Spring Align of Palatine. Maybe they can help you with a replacement rivet. Their info is:

Good luck!

Dave

Thanks Dave and Carl!  What I'll wind up doing (at this point, anyway) is using the source named Blacksmith Bolt and Rivet Supply (https://blacksmithbolt.com/collections/other-steel-rivets ) as they only require a minimum order of 10 rivets.  So I'll have 9 spare rivets left over instead of 99 left over!    Let me know if you need one!

Hi Dave, I saw Greer's rivet and it's listed at 5/16", the rivet I removed is 3/8" x ~1"....so based on having the old rivet in hand to measure I've gone looking for a 3/8"!  The springs are at the painter and tomorrow I'll see him again so I'll measure and verify the 3/8" x 1". 

I've searched the R&O for information on this rivet, couldn't find it anywhere.  Kent Thompson was more than a really good person, he was a great source for trivia like this!

...pictures of old rivet and leafs all separated:

Frankly I would not rely on that a cold riveted iron rivet does expand in the hole more than perhaps the first 2mm (1/16 in). It is different with a proper red hot rivet that is soft all the way down to the head. But then a hot rivet has to have a certain diameter or mass to keep the heat, the time it takes to form the butt. Add to that it might have to be done riveting with a certain process where the rivet is compressed with an anvil before forming the butt.

Now, the spring pack on an Indian might not be rocket ship specified, but If it was important, I would ream the holes in the spring leafs to a certain same diameter, and use a thicker rivet and turn down the shank until slide or light press fit in the hole if I couldn't find or buy a proper fitting one. Then cold hammer the butt.