[biosurfer1]

Originally Posted by cabmando

I'm not followin ya. You should be able to buy an expandable anchor that will fit the hole size you decide to go with. So if you want to use a 3/8 anchor, you drill the appropriate hole, drive the anchor in the hole, then put the nut on and tighten to the spec necessary to set the anchor.

I'm talking about an anchor like this only not necessarily that size.
https://www.grainger.com/product/15X102?ef_id=CjwKCAjw1JeJBhB9EiwAV612y07G7IBOsKBmi OJe5bxThqyEN1oc4_wyl9OjnmBxmvcnYtku0b7r1xoC-MQQAvD_BwE:G:s&s_kwcid=AL!2966!3!281698275318!!!g!470148656870!&gucid=N:N:PS:Paid:GGL:CSM-2295:4P7A1P:20501231&gclid=CjwKCAjw1JeJBhB9EiwAV612y07G7IBOsKBmiOJe5bxT hqyEN1oc4_wyl9OjnmBxmvcnYtku0b7r1xoC-MQQAvD_BwE&gclsrc=aw.ds

That should work great. Don't know why I wasn't finding that earlier. The only ones that were showing up under my search were more like inserts that epoxied in the hole, and all the inserts were a larger diameter than the bracket hole.

Thanks!