doghouse clips

Hi all,

I'm looking for the threaded clips to bolt my doghouse to the floor.
Regular clips don't work because the floor has a lip.

Any ideas?

They are called cage nuts and are available from Ace Hardware here in RI. The 61-64 were fine thread and the 65-67 were coarse thread. Only the coarse thread is avaiable now. The new ones are made for two different thicknesses, get the thinner ones.
Fred

Very cool, thanks