[placidpete]

Hi does anyone know the specifications of the hub to knuckle bolts? I need to replace all four of them after removing a difficult failed rear axle hub. The part number is GM96626203 but I’m struggling to find a supplier. There are plenty of m10 x 50 flange bolts on the market but I’d like to be sure I’m using the correct tensile strength given the critical role of these bolts.

Any help appreciated.

Thanks
Gordon

 

[Aussie Ed]

As the Vauxhall Antara is the 'sister vehicle to the Captiva have you tried your local Vauxhall (or ex Vauxhall) dealer ?

 

[placidpete]

Thanks, but yes I already tried several Vauxhall dealers too. The best they could do was 1 bolt but I need all 4.

 

[Aussie Ed]

Thanks, but yes I already tried several Vauxhall dealers too. The best they could do was 1 bolt but I need all 4.

It is usual for bolt heads to be produced with the material grading embossed in the bolt head.
What grading is shown on the ones you removed?

 

[Aussie Ed]

Thanks, but yes I already tried several Vauxhall dealers too. The best they could do was 1 bolt but I need all 4.

,Another thought. Go and purchase the one bolt which is available, then you will be able to identify the head markings and obtain three more from a fixings/bolt specialist.

 

[placidpete]

Good idea! I could see any marking on the old ones but they are pretty well corroded.

 

[Aussie Ed]

Markings depend on the bolt type ie US ASTM, US SAE, or Metric.
The markings may be difficult to spot and may only be lines, dots or clear numerals.
The following link provides details on bolt head markings (you'll need to scroll down a fair way)

What are the different types of nuts and bolts? | Global Manufacturer & Distributor of Component Solutions — Essentra Components

Our guide to nuts and bolts helps you understand exactly what they are and what they do – and how you should use them. Click now to get the whole story.

www.essentracomponents.com

 

[placidpete]

Thanks again for your helpful advice. I found some high tensile hub bolts at my local Land Rover dealer that are the same size. If it’s tough enough for a Defender it should be fine for the Captiva ( and much cheaper)!

 

[Aussie Ed]

Good solution. There are so many 'common use' parts in the automotive industry; it is just hunting them down which takes time.
Let us know when you are back on the road.

 

[Metro1000]

Most likely to be 10.9 rated I would say. As per wheel bolts, lower arm bolts etc.

 

[placidpete]

So the bolts arrived - marked 10.9 and look identical to the original. Fitted perfectly and now running again with a new hub fitted. Land Rover original part number RYG101010L for anyone who might be looking to do the same. Obviously not Chevrolet original parts so at your own risk, of course.

 

[Metro1000]

Good to hear you are back on the road, and thank you for adding to the resource here by following up and concluding your original post.