I forgot to check last night when I was working on the car

I want to pick up a single die (ie tap & die) to chase the external threads on the studs that hang out of the bottom of the block (where the oil pan connects to the block)

I *think* they're 10mm, but can anyone confirm the size as well as the thread pitch? (ie 1.25 vs 1.50)

Thanks. I want to go buy this at lunch today and forgot to bring the stud with me, etc.

 

Update: Someone on the crx forum posted the answer I needed.
Thanks anyways...


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10mm is the size of the head of the bolt or nut..
The actual size of the stud is 6mm x 1.0mm pitch..
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12NC24 is the stud thread, and the same at the block....

 

P.S.) I checked with my tap and die set I have and chased the hole and used the guage on the stud and the thread is 24..