Specifying an OE factory supplied part, even just a flange Bolt, will not only keep the machine original it will also guarantee the quality and durability that the Japanese manufacturers are justifiably famous for!
More sizes of flanged bolts you may wish top consider:
Renew the fasteners and increase the pleasure of reassembly.
Order all the gaskets, seals and other new fasteners at the same time and reduce the shipping costs with one larger order.
Add as many new parts to the same shopping cart as you wish, new washers and nuts for example, and still only pay the same single fixed price shipping cost.