Can anyone help me? The clutch assembly on the A/C compressor pulley wheel has come off, I have the clutch assembly but the bolt which fixes the clutch to the spline drive on the rotor is missing. Mazda will only sell me a new clutch assembly for £331+VAT but all i need is the bolt/bolt size and torque setting if there is one.

Anyone fancy removing there bolt to measure it for me?

 

That is bazaar. I've never heard of that happening before on any vehicle.
Why not simply take the clutch assembly to your nearest machine shop, have them measure for the correct bolt size and provide a bolt for you to re-assemble the clutch?
As far as torque specs are concerned, they might even be able to give you a usable range for that as well. If not, the A/C compressors are a typical unit used on many many cars these days. I believe they are manufactured by Sandival, but there should be a plate on the compressor housing itself that you can verify that info. Then you might look them up on the web and ask by sending them an e-mail. I'm sure they wouldn't have that info on their website.