The MS20615 Series of Solid Rivets are Universal Head Solid Rivets that come in various materials. The most common material is Monel, but MS20615 Rivets also come in Brass and Copper. The Diameter of these rivets range from 1/16 to 3/8, and the length of these rivets range from 1/16 to 2, depending on the size of the diameter. MS20615 Solid Rivets often come in a Cadmium Yellow Finish or Plain Finish.