Threaded insert Wood Zinc Alloy Screw M6 M8 Threaded Insert ‘Screw Nut À Hexagon Socket For Wooden Furniture Material: zinc alloy. Quantity : 145 items in total. Safety advice: put glue on the wood into the hole (on the side wall), insert and rotate the nut several times, apply glue to the threads of the nut, then fully tighten the nut so that it is flush with the wood. Flat and as dry as possible.