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Conical Tooth Washer Placement for Trailer Hitch Installation on a 2010 Toyota Yaris  

Question:

1. The washers appear bowl shaped. Does the bowl top point toward the hitch or the head of the bolt. A diagram would remove any ambiguity in your answer 2. Would thread lock be appropriate in this installation?

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Expert Reply:

The washers that are included with trailer hitch # 24819, are conical tooth washers similar to # 01292006-020-01. You are correct, they are sort of bowl shaped. The tooth end goes towards the hitch. I have included a link to the installation instructions for the hitch.

Using a thread locker like Loc-Tite, # LT37643, can be done but it is not necessary. The conical tooth washer prevents the bolt from backing out.

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Michael H
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Instructions for LT37643Instructions for 24819
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