It is the M6 x 1.0 x 16 bolt, but the head is 5.5 mm (not 6.0 mm as usual).

It is a special bolt made by Denso for Honda application.
Just do what I did, if you strip it, use the "good bolt" and transfer it over that hole.
Then use a generic M6 x 1.0 x 16 bolt for the other hole.

Your other option is to get the standard bolt with 6.0 mm head then grind all 6 sides a tiny bit to make it 5.5 mm.
Just a thought.

 

Correction...I think the usual M6 x 1.0 x 16 bolt has a hex head of 8.0 mm.

 

Another option is to use a bolt with Allen head. Simply use the Allen key to tighten it.
Example below:

 

Thanks for the information but I'm having a really hard time getting those bolts out. Is there a place I can purchase that part and if there is what's the name?

 

If you are getting rid of the compressor, then heat the bolt for about 15 seconds with a propane torch.
It should come out. Make sure you use a 5.5mm socket (available at Sears).

You cannot buy these bolts, they are virtually impossible to find/buy.

As I mentioned in the compressor DIY thread, I stripped one bolt, so I transferred the "good" bolt to the deep hole.
Then I use a standard bolt for the other side.

I already mentioned above, get the Allen bolt, in fact, previous models (2nd Ody) used Allen-head bolt.
You can get the Allen bolt at Home Depot, Lowes etc.

 

I will definitely get propane torch and follow your instructions. Thanks again.

 

I just verified that the Allen-head bolt works. Simply use an Allen wrench to tighten it.
Best is to get the stainless steel Allen-head bolt (Lowes, Home Depot has it).

PS: The factory 5.5mm bolt is virtually impossible to find. Unless you visit a local junk yard.

 

Well. Those 5.5mm bolts are a pain. I stripped both and could not get the port connector off the old compressor. I tried so hard, I even stripped off the head on the bolt. Anywhere I can order the port connector? And what is the part number?