Scary steering shaft/coupler failure!

Yes there are plastic shear pins used in the two piece steering shaft, they keep the shaft ridged until a front end impact. Knocking back the coupler will indeed break these pins, although the shafts are "double D" shaped it will not let the two shafts rotate but will let the inner shaft walk up and down as it pleases.
The correct fix is a new used shaft or buy the coupler clip you can purchase from eBay or other resources.

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