02 Bung Threading/Pitch

[offthewallds]

I assume it is M18 x 1.5 but I just wanted to confirm this before buying a tap. Anybody know this for fact?

Thank you!
- Dan

 

[striker2]

yes, they are M18 x 1.5, same as all O2s.

 

[amc49]

Same as old big spark plug for '60s Ford bigblock like 360, 390, 352 V8.