what does the 8.8 mean on the bolt head i need to replace some that has 8.8 on them

It is the tensile strength of the bolt. The higher the number the higher the strength. If it is an 8.8 replace with the same.

Tensile strength 8.8 is average higher is srtonger lower is toffee lol Ray

though so it the bolt for the wishbones

8.8 is the norm for all automotive uses ------ as a rule any bolt 8.8 or higher is considered high tensile.

Yeah, an 8.8 is a bog standard one.

Cheaper, lower tensile strength bolts do exist however.

5.8 - low strenght
8.8 - std grade
10.9 - std high tensile
12.9 - special app's

Most cap heads are 10.9 also.


Daniel

It also means that it its a metric thread not imperial. (or, at least, it always used to,)

[Edited on 11/12/10 by jollygreengiant]