The sixteen Vl800 Boulevard C50 2005 (k5) California (e33) Oil Pump (model K5) component parts are all listed in this schematic.
A sample from the products for the Oil Pump (model K5) include: Cap,oil Strainer, Shim(12x20x0.5), Sprocket,oil Pump Driven, Pump Assy,engine Oil.
With four applications this Bolt is the most specified part.