Amazon.com: uxcell 100 Pcs 2.5mm x 6mm Aluminum Flat Head Semi-Tubular Rivets Silver Tone : Industrial & Scientific
Hollow Rivet,2.5mm x 5mm Through Hole Copper Hollow Rivets Grommets Double-sided Circuit Board PCB 200 Pcs - Walmart.com
100Pcs M2.5 x 12mm Truss Oval Head Rivets Plate With Nickel Semi-hollow Rivet 2.5mm DIA - AliExpress
Rivet, acrylic and brass, black, 5.5x5mm with 3mm shank and 2.5mm inside diameter, fits 3.5-5mm hole. Sold per pkg of 50. - Fire Mountain Gems and Beads
Rivet, TierraCast®, silver-plated brass, 5x4.5mm with 2.4mm shank and 1.5mm inside diameter, fits up to 2.5mm hole. Sold per pkg of (10) 2-piece sets. - Fire Mountain Gems and Beads