This is a #8 insert nut for wood. It is designed to mate with #8-32 screws.
The purpose of the insert nut is to provide a more structurally sound fastener for wood material. The insert nut will provide a much better hold than a general wood screw.
For use with #8-32 screw size
Dimensions: 10 mm (3/8") long.
Instructions: Drill 7/32” hole and install with a 4mm hex key.