Philip Erickson wrote:
> Hello from San Diego 70's (Burr) and clear
> 8.8 are only SAE grade 5 bolts.
> !!!!!! Use 10.9 bolts or SAE grade 8 for suspension !!!!!!!
> I have seen that done on race cars to get full back caster with 2° camber.
> I would use one regular and one lock nut on each bolt.
WAIT! Grade 8 bolts are stronger in tension, but are more brittle than
Grade 5 and are not as well suited to shear loading, especially single
shear. If you want bolts that are better than stock, get a shanked bolt
the correct length for your application in a grade designed for the
loading the fastener will see. In many OEM suspension applications this
is exactly what the manufacturer used. Grade 8 is not better suited for
many of the automotive apps, such as some suspension applications. In
fact in some applications the Grade 5 bolt is the better fastener.
Z Car & Classic Datsun Magazine