Product Details: Material: Carbon Steel Thread Dia: ST4 Thread Length: 35mm / 1.38inch Head Dia: 6.3mm / 0.25inch Head Thickness: 2mm / 0.08inch Package Content: 25pcs x Phillips Pan Head Self-tapping Screws Material - The Phillips pan head self-tapping screw is made of carbon steel, zinc plating surface finish, which has high strength, anti-rust and corrosion resistance, long service life, and is solid.Feature - For different materials, cross grooves are easy to drill into, such as wood, spray painted sheet metal or other materials, and are good hardware fasteners. The self-tapping design allows faster screwing into hardwood, reducing cracking problems.Application - Sheet metal screws are widely used for furniture, household goods, electronics, communications, power products, floor fastening, industrial, construction, machinery, equipment maintenance and other DIY projects.Notice- For harder materials, it is recommended to pre-drill with a drill to make it easier to insert the screws. This prevents the material from cracking or screws from slipping.