I'm looking to replace some broken bolts in my 9-bolt differential case.

According to the markings on the head, I need:

8mm x 50mm, grade 12.9, 1.25 thread, hex flange bolt

I've looked all over the internet and I can't seem to find a distributor who sells these. I have found socket head bolts and lots of 10.9 grade bolts, but nothing that matches the specs above.

Does anyone know where I can buy some of these or if there is a suitable alternative?

Thanks!

 

I was sure arp had some try a search with arp and 9bolt?

 

You're right! I did a search on the thirdgen boards and found some posts where guys have used ARP bolts to assemble the carrier.

I just checked the ARP web site and they sell bolts that are nominally rated at 180,000 PSI, which is just a bit higher than the 177,000 PSI for a 12.9 bolt.

Thanks for the tip!