Rated 4 de
Neat product!I bought a few of these inserts to repair some wood chairs. Worked beautifully. Allowed me to use bolts instead of screws. With inserts, bolts can be removed and reinstalled when seat covers need replacing.
I don't know the specific thread size, but here are some measurements that might be helpful: overall outside diameter is 15/32"; thread density is 3 threads per 5/16"; thread depth is 3/32"