[killabee44]

Bump!... Anyone know the size of the bolts?

 

[Uncle Rico]

Hi Killabee, did you ever find your bolts? I just did the same thing for a Uhaul class III hitch. The instructions call for 12mm x 1.25 (i.e. super fine thread) x 40 mm long class 10.9 bolt with yellow zinc finish. I couldn't find anywhere but the equivalent Curt hitch uses the same but 35 mm long which I did find as Dorman part no. 981-637. These are available on lots of auto parts websites (this part no. is a package of 2 bolts). I could only find the conical ribbed washers on etrailer.

Dorman Products - 981-637

Hex Bolt - Class 10.9 - M12-1.25 X 35mm

www.dormanproducts.com

https://www.etrailer.com/Accessories-and-Parts/Reese/01292-008.html

regards,
uncle rico

 

[Honda2Toyota]

Hi Killabee, did you ever find your bolts? I just did the same thing for a Uhaul class III hitch. The instructions call for 12mm x 1.25 (i.e. super fine thread) x 40 mm long class 10.9 bolt with yellow zinc finish. I couldn't find anywhere but the equivalent Curt hitch uses the same but 35 mm long which I did find as Dorman part no. 981-637. These are available on lots of auto parts websites (this part no. is a package of 2 bolts). I could only find the conical ribbed washers on etrailer.

Dorman Products - 981-637

Hex Bolt - Class 10.9 - M12-1.25 X 35mm

www.dormanproducts.com

https://www.etrailer.com/Accessories-and-Parts/Reese/01292-008.html

regards, uncle rico

Hate to bump this, but ran across this thread while trying to get bolts to plug the holes since the dealership removed my aftermarket hitch (long story) but never put the tape or plug back over the holes. A conical ribbed washer is also known as a belleville washer and can be found here as well: Washers - Belleville Washer - BelMetric

 

[M. Johanson]

I installed a Curt Class 3 hitch receiver last year and the included bolts were not the correct size and threads. I went to Lowes and got some Class 10 bolts (M12x1.0x40 I think) just a bit longer and added a thick washer and lock washer. I sprayed the bolts with DGF and installed wet and extra torque. The trailer wiring was a little tricky and the long tail needed 3 wraps around the fame to avoid dragging. I added a Toyota logo cap from Amazon. I have used it 2x for long trips with 4 on board and a cargo basket in the receiver. I have used it 2x to pull a uhaul trailer with a BMW R1200GS. Mileage went down to 12-16 mpg. The ECO needed to be off. Happy with the upgrade.

 

[Double G]

Interesting. I installed a Curt on mine and the bolts it came with worked perfectly. I did have to run a tap through the threads in the "frame" to clean them out.