O2 sensor thread size and pitch?

[DanRC30]

Anyone know this? I want to buy a tap.

 

[Daedalus]

I'm fairly certain they're 18mm x 1.5mm. I tried measuring one but they only have about 4 threads, so it's kind of hard. 1.5mm is almost identical to 16tpi, but then 18mm isn't close to anything SAE standard. A quick google search shows that 18mm x 1.5mm O2 sensor weld bungs are widely available.

 

[angus]

yup 18 x 1.5

 

[e.pie]

good to know

 

[DanRC30]

Thanks guys. Now all I need to do is find a tap that size. I want to clean the threads before putting in the new O2 sensor...