50 Pcs 5/32" x 5/16" Shank Flat Head Copper Solid Rivets Fasteners These are copper(not copper plated base metal) solid rivets. Strength after cold-heading, corrosion resistance, and antimicrobial properties. Conductivity of copper makes Copper Solid Rivet perfect for use in electrical applications. Our copper products are ideal fasteners for your requirements for their best strength. Copper Solid Rivets are a good choice for electrical properties and corrosion resistance.