Originally Posted by Kevin A
Most of the woodworkers i've spoken with regarding using fasteners or inserts (t-nuts, hurricanes, etc) suggest going with the threaded inserts, especially when using ply or mdf.
True, the exterior-threaded insert will have better holding power--less likely to get ripped out due to over-torquing of the bolt threaded into it.
That advantage goes away if the insert has a flange at one end--you are not likely to rip a flanged insert loose by over-torquing.
The exterior-threaded insert, while favored among experienced woodworkers, is not one that I personally would recommend to less-seasoned wood-working veterans, who intend to use them in plywood, due to the increased likelihood of ply separation.
So, yes you can use them in plywood.
Maybe you will have no problems the first time and every time you use them.
But then again, you may get to see de-lamination of the plys.
My answer was based on actually threading the insert into the proper sized hole. Adding some adhesive can further strengthen the grip.
But, I realized that your picture shows over-boring the exterior-threaded insert hole, and back-filling it with epoxy, so the threads do not cut into the wood, and no de-lamination will take place. But, that defeats the purpose of the exterior threads. I see no obvious advantage in using either one of these two inserts over the other as shown in the picture you provided.