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Old 04-28-2018, 05:59 PM   #3
Bigdav160
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Join Date: Apr 2011
Location: Klein Texas
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Re: GM Accessory Auxiliary Step - install question

They appear to be nutserts. I use a tool like this one to collapse them. I am not sure you'll be able to do it with just the bolt.

I noticed the one I linked to has just metric anvils. This one has fractional and metric
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