This architectural drawing is Split pin for install the section design with detail AutoCAD drawing, dwg file, CAD file. To secure the various parts in place, a cotter pin is a wedge or pin that fits into a hole. The cotter pin is also known as a split pin or cotter key in the United States. A stout wire with a semicircular cross-section serves as the material for the cotter or split pin. For more details and information download the drawing file.