What is the Thread Size and Pitch of the Tow Smart part # TS89ZR Mounting Bolts?
Updated 05/18/2026 | Published 05/16/2026 >
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Question:
What is the thread size and pitch for the mounting bolts?
asked by: Greg T
Expert Reply:
Hi Greg,
I was able to find installation instructions for the TowSmart Trailer Hitch part # TS89ZR (2044 is the manufacturer part number) with the hardware information. The bolts are a standard hex head that are 12mm in diameter with a 1.25 pitch (1.25mm between threads). It is 30mm long, has a class 10 strength rating and a yellow zinc finish. I've linked the file with the installation instructions for you as well. The instructions also give the proper specs for torquing the bolts down, which is 86 ft-lbs for all the bolts.
Are you looking for replacement hardware for this hitch? Or installing it for the first time?
Product Page this Question was Asked From
TowSmart Trailer Hitch Receiver - Custom Fit - Class III - 2"
- Trailer Hitch
- For Towing
- Class III
- 350 lbs TW
- 3500 lbs GTW
- 2 Inch Hitch
- Visible Cross Tube
- TowSmart
more information >
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