Spark plug tap # reference ??

Anybody know what the tap # or thread and pitch size is for sparkplug holes is on the 85+ 22r motors??? My number 2 cylinder has a burr on on the threads and I don't want to force and strip it out.

get a spark plug re threader so you don't accidentally screw up what threads are left. any auto parts store should have them. 14mm is the answer.