Amazon.com: uxcell 100 Pcs 2.5mm x 5mm Aluminum Flat Head Semi-Tubular Rivets Silver Tone : Industrial & Scientific
Rivet, TierraCast®, antique brass-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