Replacement Hardware For The Curt Trailer Hitch Receiver # 13591
Updated 02/03/2026 | Published 06/23/2024
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Question:
I also have this hitch the 13th 591. I was given the wrong bolts I bought it used. I’m talking about the four bolts that go on both sides for the equinox. It says I have to use grade 8, but it says the replacements M12 175. Which I don’t think you can get in a grade 8, or if you can know where to find that
asked by: Tyler R
Expert Reply:
Hey Tyler,
The Curt Trailer Hitch Receiver # 13591 uses M12-1.75 x 40 mm. Class 10.9 Zinc Yellow Hex Head Cap bolts on the sides. You should be able to find these at your local hardware store or can order all new hardware by entering in the hitch part number on the # RHK page.
Product Page this Question was Asked From
Curt Trailer Hitch Receiver - Custom Fit - Class III - 2"
- Trailer Hitch
- For Towing
- Class III
- 350 lbs TW
- 3500 lbs GTW
- 4000 lbs WD GTW
- 2 Inch Hitch
- 400 lbs WD TW
- Concealed Cross Tube
- CURT
more information >
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Jerred H.
2/3/2026
Hey Tyler, did you end up finding the right Class 10.9 bolts for your Equinox hitch? Knowing what worked could help others trying to replace their hardware too.