Can someone help me identify this worm gear?

[mcgeesjlm73]

I got this in some parts I purchase but it has no part numbers.
Was wondering if it could be a improved 20:1 ratio Manual Steering Gear Worm?

And is there a way to find out.

Thanks
Jerry

 

[mcgeesjlm73]

Mark the shaft and tell me how many rotations there are from stop to stop?

Thanks

 

[cudamark]

Mark the shaft and tell me how many rotations there are from stop to stop?

Thanks

Yup, looks like a 20 or 16 but you need to count the turns to be sure.