So, when my machinist tore down my motor, I asked him to set aside all factory bolts that were "external" to the cases so I could replace them all with new SS bolts (flange heads, 12pt ARPs to be exact). He did that very kindly.
I catalogued each bolt and identified it; except 1. This is an M8, flange head, and I measure it at 144MM which makes it 5-5/8" long for us "imperially challenged folks". I can not for the life of me, locate this bolt in the parts fiche from CMS, nor any supplier on earth (finding an M8 at the length appears impossible). Before I turn 1 on the lathe, I thought I'd check with you all.
It would be highly unlikely that this bolt is NOT from my motor, as the machine shop only had my lower end at the time. Could it be from another customer's project, yes, but it does very closely resemble all my other bolts in corrosion, head stamping, etc.
Perhaps someone (Dave500, Bill Benton, Hondaman, TT, or other) can accurately identify this for me.
Here's a picture:
