• Countersunk head screws with internal hexagon made of high-quality 10.9 carbon steel, with a black surface treatment that provides good hardness and high strength. • The package contains 50 pieces of M6 x 20 mm screws, with full thread and internal hexagon drive type. • Thread diameter: 6 mm; thread pitch: 1.0 mm. • All screws are presented in a sturdy and durable box, which can also be used as a storage box. • Versatile use in machinery, furniture, car and motorcycle repair, as well as DIY projects. • Caution: contains small parts, keep out of reach of children.