M8 x 17.5mm Four Pronged Tee Nuts - Steel Zinc Plated Tee Nuts are intended for usage on composite materials such as wood and some plastics. They reduce the possibility of material splitting or being damaged during installation and have a higher shear and torque strength than wood screws. As the bolt is tightened, the Tee Nuts prongs steadily bite into the surface being fastened, and the internally threaded barrel enables the bolt to be anchored firmly into the material. These Tee Nuts are made from Bright Zinc Plated Steel which provides a level of corrosion and oxidation resistance as well as a bright finish. For larger quantities or items not listed, please email and one of our team will provide you with a quotation. M8 x 17.5mm Four Pronged Tee Nuts - Steel Gr.4 Zinc Plated