Steering box to steering column pinch bolt

Does anyone know what thread these are? Part number is 607972 "BOLT SPECIAL FOR STEERING"

Mine's gone missing during rebuild and need to source another none of the usual suspects seem to have it...

D

Blanchards have it https://secure.pablanchard.co.uk/product.asp?productID=6535

Thanks for the reply, I bought a replacement, and then found an identical one on the shelf! Unfortunately at some point someone has taken a hammer to the pinch bracket and squashed the thread slightly so I will need to tap it out...

So, I'll ask the question again - does anyone know the size / thread so I can buy a tap? It looks to be coarse but doesn't seem to match any of my coarse taps. Maybe Whitworth?

Cheers

D

unc if it goes into ali

Cheers James,

It's not into ali, its the pinch bolt that nips up the (cast iron/steel?) collar on the top of the steering box (607971)...

I was assuming that part would be expensive but I've just looked and Craddocks have them for a few quid which is probably cheaper/easier than finding the right tap...