uxcell M5.5x100mm Hex Washer Head Self-Drilling Roofing Screws 10 Pcs Product Name : SelfDrilling Screw;Material : 410 Stainless Steel, Neoprene;ThreadDiameter (d) : 5.5mm / 0.22";Thread Pitch : 22G Thread Length (L1) : 100mm / 4";Flange Diameter (dc) : 12mm/0.5";Hex Wrench Length (k) : 3mm/0.012";Head Thickness (k1) : 5mm/0.2" Flange Thickness (c) : 1mm/0.04";Width Across Flat (s) : 8mm/0.3";Width Across Corner (e) : 9mm/0.35" Washer Size : 10 x 2mm/0.4" x0.08" (D*Thickness);Total Length : 105mm/4";Head Type : Hex Washer Head Color : Silver Tone;Weight : 125g;Package Content : 10 xSelfDrilling Screws