You sure must be blind.
On the Micro Fastener web site the bolt # is SCA 1440 1/4-20x2.5.
I e-mailed & call Micro Fastener and for everyones info. the bolts are Hardened alloy steel 12.9 grade Rockwell C39 to C45 equivalent or stronger then Grade 8.
Prove is in the pudding!
Now please Moderator close this thread enough said.
MB