Head Diameter: 5.4mm (min)-5.7mm (max); Head Height:1.4mm (min)-1.6mm (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.