Head Diameter: 9.1mm (min)-9.5mm (max); Head Height:2.5mm (min)-2.75mm (max)
Material: Alloy Steel, Grade /Class 10.9, coated with anti-rust oil. The alloy steel material provides some extent chemical and corrosion resistance. Perfect for indoor projects. We advise you to consider 304/316/410 stainless steel for outdoor projects. Find them in our store.