An insert nut is a specialized fastener containing a hollow core designed to accommodate a bolt. It possesses threading on both its inner and outer surfaces. The outer threads enable the insert nut to be embedded into a material or component, while the inner threads provide space for bolt installation.

Insert nuts are placed into pre-drilled openings using either a screwing or hammering method. In both installation techniques, the external ridges grip the wood material, ensuring the nut remains stable against rotation and extraction.