Metallics Combo anchor spring wing toggle bolt features steel construction with zinc chromate finish for superior corrosion resistance. This UNC bolt has thread of size 6 and 32 TPI. It measures 4-Inch x 1/8-Inch Dia. Mushroom - truss headed bolt has slotted/Phillips driver. It has tensile strength of 200 lb for 1/2-Inch wallboard. This bolt is perfect for light-duty anchor for use in hollow block and gypsum wall.