This M3.5 x 50 self-tapping screw is made of high quality 304 stainless steel, strong, durable and durable, it is rust and corrosion resistant and suitable for indoor and outdoor use. It comes with a self-tapping design, is easy to use, except the screwdriver, no additional tools are required. It is also made by a precise process, the size dependence is limited to 0.01 mm. Competitive price but high quality, 300 pieces in pack. Specifications: Size: 3.5 x 50 mm. Material: High-quality 304 stainless steel. Head type: Flat head shape: Countersunk head packaging included: 300 x NUZAMAS 304 stainless steel 3.5 x 50 self-tapping screw