Can anyone identify the exact size nut on this blowup diagram? (O2 sensor nuts)

Hey folks, I’ve been able to find the nut on the online manual but unfortunately it doesn’t say what size it is. The 2 nuts fell off on mine and the O2 sensor popped out and is just hanging there. Can anyone identify the size I need to get?

 

Call the toyota dealer..... maybe they'll even give you a couple nuts for free.

 

^Don't be naive. Dealer will probably charge him $5 ea.

Nut P/N 90179-08059: http://www.villagetoyotaparts.com/products/NUT/3321176/9017908059.html

According to these two pages, thread size is M8x1.25: http://forum.ih8mud.com/threads/nut-size-for-the-o2-sensors-please.277044/

If you decide to try the hardware store, use only stainless nuts. Don't get ones with a plastic locking element.

 

most Tacoma O2 sensor nuts are 8mm x 1.25.

I bought steel lock nuts in that size from a local nuts and bolts place and they worked perfectly.

 

So a Toyota automatic shift knob will fit on the O2 sensor stud?

 

theyre 8X1.25 mm nuts. try and get prevailing torque nuts. and heat treated if you can.

or at least they are on my 2k 3.4 4x4 ext cab

 

Stainless work the best!!

I find Toyota very reasonable on hardware prices

 

Yeah I did find a thread here: Tried finger tightening some I grabbed from Autozone. I think I had just got them started to thread when they just wouldn't go any further on either stud. So figured they must have been the wrong size. I'll grab an actual socket wrench and force them on there.

KenLyns, I may just order that exact part if I can't get this M8x1.25 on here. Thanks all for the replies.