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-   -   12mm spark plug thread pitch? (http://forums.pelicanparts.com/911-engine-rebuilding-forum/266338-12mm-spark-plug-thread-pitch.html)

Bullet Bob 02-13-2006 07:00 PM
12mm spark plug thread pitch?
 
I plan to machine my heads for twin plug ignition and I need to order the tap. I don't have a one on hand, but I plan to go with a 12mm plug. Anyone know what the thread pitch is for 12mm plugs?

Thanks,
Bob

cgarr 02-14-2006 04:43 AM
It the same as the 14mm 1.25 do some test taping with it and check your plug in some alum, new taps are to sharp I found out.. you may want to take the real sharp edges off a new tap so your plug is not loose..


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