Front top ball joint spacers ??? Bolt size and thread type ??

[niks_terrano ii]

Hi guys thinking About putting some of these spacers on my truck they are 18mm for sale on eBay

But you don't get longer bolts with them

So my question is what size bolts are in the top ball joints ???
And what thread are they ??

I know it's a fairly random question but when I removed the old ball joints I broke the bolts getting them out and really don't want to do that with these ones until I have the spacers to fit in.

 

[stinka]

I have these spacers too, sat in the garage. Not attempted to fit them yet as not raised the rear yet