A sample from the products for the Crankcase include: Seal-oil,32x52x10, Plug, Bolt,oil,l=23, Pipe-oil.
This Crankcase diagram displays the required parts for the Ex300bdfa Ninja 300 2013 Usa / Abs Crankcase.
On this parts fiche the Bolt,flanged,6x14 is the most specified component.