Use push-in rivets for fastening wood, metal and plastic panels that are only accessible from one side. Push-in rivets are made of plastic or nylon and have a variety of head shapes and shank styles. Christmas tree rivets have ribbed shanks, while arrow rivets have bowed, bifurcated shanks. Whether you need a plastic rivet for a door panel or a fastener for a circuitboard, Grainger has the push-in rivet you need.