T-Nuts

T-nuts are barrel shaped fasteners with internal threading, and are used to provide an anchor point for a bolt in a piece of wood, whether a flat board or a dimensional piece. They are especially useful when a flush surface is wanted. T-nuts have a flat base with prongs bent up at 90° angles, parallel to the barrel. After pre-drilling a hole, the t-nut can be fixed in place either by tightening a bolt into it from the top, which pulls the prongs into the wood, or using hammer to pound the locking prongs into the wood until flush.