Bed bolts for camper cabinet install

[sigasiempre]

I’m considering backing out my F150 bed bolts and installing longer bolts to install cabinets for my camper. I’ve heard that the original bolts are specialized and once they are removed they should be replaced with new bolts. But if I install longer bolts these won’t be the same type of specialized bolts (which are too short for my purposes). I’m thinking of torquing my longer bolts similar to the original bolt specs and then checking them regularly with the torque wrench to make sure they are staying tight. Since I’ll be installing the longer bolts through one-by wood, I’d also use hefty washers like used on sill plates for house construction to make sure the bolts are solidly installed. Reasonable plan or not? What do people think?

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[powerboatr]

if bolts you put back are same tensile strength..no problems
somebody knows if they are grade 5 or 8

 

[Buyer2021]

I’ve heard that the original bolts are specialized and once they are removed they should be replaced with new bolts.

That's correct per the Workshop Manual, and the spec TQ is 46 lb. ft. Note these are heavily galvanized bolts which affects the TQ, and I would search for the same coating. Given that TQ, grade 5 is quite adequate IMO.

Personally, I don't see a particular problem with your concept. I'd consider solid synthetic (PVC) 'lumber' for the strips and ensure they are shaped to fit the bed corrugations very closely. PVC because it's much more stable in varying moisture / humidity conditions (and lends well to screw+glue to the attached cabinets like wood).

Having said that, PVC lumber has a compressive strength of ~1k psi which is a lot less than, for example, Southern Yellow Pine, so go with what makes you comfortable.

Keep us posted, Have Fun!

 

[sigasiempre]

Thanks Buyer 2021. Super helpful!

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