concrete coil insert question

[delagina]

I will use this coil insert on my slab supported on drilled pier so they can lift the slab later.
Slab is located outside exposed to rain.
The coil will be galvanized to help with rusting.
But I still want to fill the hole.
What can I put inside the hole that they remove later?

 

[delagina]

nevermind, supplier told me what to use. they have a removable "screw" that can fill the insert.

 

[XR250]

yea, i was gonna say a greased, flush, allen screw