Wanted TsuMura Rivets 050 058 Gauge Sprocket Tips close to 40 of them.
Saving some info shared by JJ. = Stihl rivets
They're near to the same size as all the Windsor rivets and work fine on the Windsor three and five rivet tips, as well as the Oregon three rivet and external roller nose tips. The part number is: 0000-974-0503 and they list for $0.33 each. Last time I bought some, I got 7 bags of ten for $3 a bag. They also fit the GB three-rivet tips and
Also McMaster Carr
solid countersunk rivets