Don't use substitutes, choose only OE replacement parts, especially when it is a cowl Bolt.
It has a job to do, and when it is the correct specification OE part, you know that job will be carried out perfectly, now and over the longer term.
More sizes of flanged bolts you may wish top consider:
An OE part that shows the machine is cared for properly.
At CMS, we are Japanese bike enthusiasts in general, so hopefully understand our customer expectations.
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.