I'm pretty sure I replaced my bleed screw bolt with an off the shelf
8mm stainless steel bolt from the hardware store.  Kept the copper
washer though.  Whatever the standard thread pitch is for 8mm, that was it.
YMMV

DM&FS

At 05:42 PM 6/12/2007, Craig Morton wrote:

>My radiator bleed screw has damaged threads. I would like to replace
>it but I am not sure what size it is or where to get one. It appears
>to be a brass 7 mm bolt but the pitch is less than the normal 1.0
>for 7 mm bolts. 7mm bolts are hard enough to find but this one may
>be down right rare unless it comes on something more common than a
>Vanagon radiator. Anyone know what it is or, more importantly, where
>to find one?
>
>   TIA
>
>Craig
>
>
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