19×4,8 mmMaterial: Stainless steelCertification: ETA 10/0200Screw Ø: 4,8 mmLength of thread: 19,0 mmScrew head: Hexagon head with flangeScrew tip: Drill bitPre-drilling not necessaryMaterial of roof sheet: Aluminum, SteelMetal thickness aluminum: 0,50 – 1,00 mmMetal thickness steel: 0,40 – 1,00 mmDrive: Width across flats 8