Assuming MA61 IRS?
M18x1.5, ~10mm thread Depth (with copper washer installed), 27mm Socket to remove.
Why not get a new one (and copper washer) from Toyota and weld a decent nut on it while it is out before install?![]()
I'm not sure what the difference between the part numbers / years but I suspect they interchangeable... I think maybe one has a flat head and the one has a slightly recessed head (I recall seeing two different types in my life?!)
Toyota: 90341-18049 [8108-8401], AA63, SA63, RA61, 63, MA61, Plug for rear differential carrier cover
Toyota: 90341-18006 [8401-8512], AA63, SA63, RA6#, MA61, Plug for rear differential carrier cover
Toyota: 12157-10010 [8108-8512], AA63, SA63, RA61, 63, MA61, Gasket for rear differential carrier cover
Cheers
Wilbo
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