●Small quantity, convenient, 8 pieces pack product.●The attachment and detachment of the screw can be freely conducted and finishing is uniform with simple construction.●For installation of lighting fixtures, audio equipment and shelving brackets to hollow walls.●Nominal Designation of Thread:M4●Outer Diameter (mm):6.7●Screw Length (mm):39●Applicable Board Thickness (mm):3 to 10●Maximum Tensile Load (kN):0.3●Pilot Hole Diameter (mm):9●Compatible Gypsum Board: Thickness 9.5mm●Steel●Surface treatment: Trivalent chromate treatment
