The Screw.washer.4x6 is the lowest priced item on this E-10 schematic.
The Honda E-10 has ten products enlisted in the schematic.
Parts such as the E-10: Motor Unit,start, Sub Harness, Bolt Earth(6x16 Sn), O Ring are included in the Nsk50sh Dio/dio Special 2004 (4) Japan Af62-100 E-10 parts fiche.