The component with the lowest price in the E-13 REAR CASE schematic is the Bolt,flange,6x35.
A sample from the products for the E-13 Rear Case include: Guide,acg Oil, Gasket,rear Case (mca), Bolt,flange,6x35, Dowel,pin,8x14.
This E-13 Rear Case diagram displays the required parts for the Gl1200a Goldwing Aspencade 1984 (e) E-13 Rear Case.