Specs for 2016 Prius tow hook

Why not just take the one you have out of the trunk and measure it?

 

Or more specifically: maybe if you find something the supplied tow hook will screw into, say a similar component at a local auto supply store, then you'll have an idea what's compatible.

 

Better luck at a hardware store which carries a full range of metric nuts. If what you want is diameter and pitch, you can get that from the specs for the nut that will screw on.

I can tell you that the ones for the Gen 4 Liftback are different from the ones for the Gen 3 Liftback, they look similar but the threads are different.

 

I went through this exercise back with my Gen 1 (it turned out to be M22x2), but now I have a Gen 3, and I see it is different, joy. Whether Gen 3 and Gen 4 are the same, I don't know.

My Gen 3 eye seems to have a major diameter around 17.66 mm and thread pitch around 3 mm, and the thread form does not look like a common screw thread. It looks like a trapezoidal thread form, possibly Acme (apparently there is also a DIN metric trapezoidal standard, but the Wikipedia article suggests Acme may be more common even in usually-metric regions).

If you find a source for a 5/8" x 8 Acme nut, you might see if the tow eye fits it. In the chart of Acme dimensions that seems close-ish to what I measured. (Again, I'm looking at a Gen 3 tow eye, no idea if they changed it again for Gen 4.)

It might be tricky to find prefab accessories with that thread; perhaps you'd end up finding or fabricating something with a plain end and having it threaded at a shop with the proper tooling.

-Chap

 

bump

 

Derek Cross from cravenspeed.com told me that the threads on the 2016 Prius are a 19mm knuckle thread.