Doing the timing belt job and decided to change out the oil pump seals as well. The flanged hex nut on the oil pump pulley was totally seized on there (12mm) and so had a difficult time removing it. Definitely more than the 21 ft/lb that the manual calls for. Ended up rounding out and marring up that nut when removing it.

Does any one know where I can obtain an exact replacement one? O'Reilly has one but the flange part of the nut isn't as wide and it doesn't seem like the nut sits as tight.

Can I get one from a toyota dealer?

 

The Toyota parts diagram doesn't show the nut, thus no part number available.

A Toyota parts department person may know of substitutes.

Search the net for 12mm flange nuts of grade 8. This nut will be strong enough to torque up.