Parts such as the Canister (e33): Pipe,canister, Cover,canister, Hose,pipe Joint, Hose,joint Fuel Tank are included in the Vs1400glp Boulevard S83 2007 (k7) California (e33) Canister (e33) parts fiche.
On this parts fiche the Washer(6.5x22x1.6) is the most specified component.