My 2017 Thor Vegas 25.5 had the hitch bolted on with Grade-3/5 Carriage bolts. I am convinced that none the bolts had seen a torque wrench at any point in their lives. All 6 of them were just a little more than finger tight.
I replaced them with Grade-8 bolts, Grade-8 Nylock nuts and Hardened washers. I torqued them to the spec for the bolts. These bolts along with the frame and hitch are all inspected carefully before every trip. So far, nothing has lost torque and ((knocking on wood)) no stretched bolts needing to be re-torqued.
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One thing I have learned in 30+ years of RVs…. Trust no one but yourself to keep you and your family safe.
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Regards - Randy
2017 Thor Vegas 25.5
Randy’s Rod Shop & Fabrication
Midlothian, TX / Gold Canyon, AZ
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