Cargo area bolt size?

[LTrain0800]

I have pulled the third row seat brackets and I am preparing to bolt in a sub floor as a base for my storage system. The bolts look like they might be long enough to to the job but I'm thinking about getting longer ones for security. My question is has anyone else done this and where did you find the bolts?

 

[badlander]

Bolts are M10 x 1
I bought grade 10.9 Flange Head bolts at Auto Zone. They are yellow zinc plated. Advance Auto also has them. They both have them in various lengths.

 

[badlander]

Also, in case you didn't notice, the front 4 nutserts in the floor are open to the elements underneath. Bolt length does not matter in those. The rear 4, however, are capped off on the bottom so if you use bolts that are too long in the rears you may break thru the nutsert or bind up the bolt and nut and possibly tear it out of the floor.

 

[LTrain0800]

Thanks for the heads up about the capped captured nuts, I hate when those break!