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You can either drill into the toolbox and through the bed rails and bolt it down or you can buy clamps that screw into the toolbox "wings" that overlap on the bed rails but that clamp the bottom of the toolbox wings to the top of the rail. These are somewhat hard to find but work well and save your bed from drilling. They are great if you plan on removing the toolbox. I found a pair at WalMart back in 1996 but I haven't seen any as of late.
Originally posted by Stampede How do those bed tool boxes mount to your truck bed?
Thanks Stampede
I just got a DeeZee Tractor Supply Co tool box.
I like this box because even though it is over the bedrails it doesnt rise above the rear window frame and it is deep in the bed with clearence for a row of 2x4s just under the bottom of the box
It came with 3/8" J hook bolts (2)
You just drill a hole in the box lid near the bed rail of the truck, not thru the bed rail.
Then feed the hook up from underneath the box and hook it under the bedrail. Add the nuts and washers from the top and bolt er down. It even has little black tubes to slip over the bolt ends.
I added two more hooks, one on each side, for a little more security further back toward the bulkhead. Just so someone can't get back there too easy with bolt cutters.
TSC also has special clamps that mount to the bed rails then you drill two holes on each side of the tool box and bolt them down with 4 3/8 in straight bolts. The clamps sell for about 20 bucks
You can also just buy "J" hooks at any hardware or Home Depot sytle store. The hooks for my Husky box I bought at HD weren't long enough because of the rail protectors so I had to buy longer ones. This style of attachment is great because you can remove the box easily.
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