Sachs hub brake axle thread type

[tyred]

I'm working on an early 80s Pashley which had been stripped by someone else before coming to me. I have everything in a box apart from the nuts to hold the front wheel on which seem to have gone walkabout.

The hub is some sort of Sachs made drum brake. The axle is 9mm diameter. I've visited all my spare wheels (mostly old and British really and few moderenish cheap MTB wheels) and none have nuts that fit properly.

I don't have a thread guage but can tell at a glance that it is not a standard metric thread (it's much finer, similar looking to the Raleigh 26 TPI threads) so what it is it likely to be? If I order 9mm track nuts, are they likely to fit or did Sachs use some weird propriety thread?

 

[Tim Hall]

I have an inkling in the back of my mind that they used an odd size. Leastways their rear hubs did, M10.5 or some such.

The SRAM website has (or had) exploded views of all their various hubs which show thread sizes. If it doesn't anymore I might have one downloaded somewhere.

 

[Tim Hall]

Right. I've had a look through the 1999 version of spare parts list. Annoyingly it doesn't show the nuts as a separate item, nor mention the thread. I was right about rear hubs being M10.5 though.

 

[Smurfy]

I got fed up with guessing and bought a metric and non metric thread gauge.

If you don't have a thread gauge I suggest counting the tpi (threads per inch) using a steel rule. You could then try converting to metric and see if that makes sense as a standard metric thread for 9mm diameter.

This website might help
http://mdmetric.com/tech/tict.htm