Rivet Diameter is offered from 1/16-inch (1.6 mm) to 3/8-inch (9.5 mm) in diameter (other sizes are considered highly special) and can be up to 8 inches (203 mm) long. And is denoted by Drivet. Rivet Diameter is usually measured using the Millimeter for Length. Note that the value of Rivet Diameter is always positive. Typically, the value of Rivet Diameter is greater than 0.