The M3.9X9.5/B14065 is a metric self-tapping screw from Bossard. It is made from high-quality A4 stainless steel, and is designed for use in areas, such as high-moisture and corrosive environments, where standard carbon steel screws may not be suitable. It has a rosette head style and a slotted drive type, with a 4.5mm nominal diameter and a 9.5mm nominal length. The thread is a metric M3.9 fine pitch, and the part number is B14065.