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Can Grade 5 Bolts of Draw-Tite Adjustable Ball Mount 7390 Be Changed to Grade 8?

Question:

I was surprised to find the attaching bolts are grade 5. Should I change them to grade 8 ?

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Expert Reply:

The Grade 5 bolts of the Draw-Tite AdjustableBall Mount with Sway-Control Tab, 6,000 lbs # 7390 has been tested and rated for that towing capacity using those bolts. You of course can upgrade them to Grade 8, but that doesn't increase the capacity of the ball mount. The weakest component of the mount will be the limiting factor and since Grade 5 bolts were used for testing, the manufacturer only has tested for that capacity.

This ball mount is a really nice option for applications that are 6,000 lbs maximum towing. I've attached a photo with some measurements to help as you determine the fit for your application.

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