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profdant139's avatar
profdant139
Explorer II
Jan 25, 2019

Questions: self drilling/ tapping screws for chassis work

I'm getting ready to install my underbelly cover -- there will be aluminum C channel beams (to support the foam panels and the coroplast under-skin) attached to the underside of the trailer's frame me...
jkwilson's avatar
jkwilson
Explorer III
Jan 25, 2019
No need for a pilot hole. I’ve replaced floors in a couple of stock trailers driving self drilling hex head screws through the wooden boards into the steel I-beam cross members. You can put them in as fast as you can get them in the driver.

Used a drill because drivers weren’t around, but that’s what I’d use now.

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