Hex Flange Head self drilling roofing screw 

Roofing screws Roofing screws provide secure metal-to-wood fastening with strong holding power, without the need to pre-drill. Sharp self-piercing point is ideal for fastening corrugated roofing panels to wood structures. Self-sealing neoprene washer provides a waterproof seal and a premium finish provides exceptional corrosion resistance in harsh outdoor environments. Installs with a standard screw gun and a 1/4 in. hex drive bit. Self Drilling Screw SELF Tapping Screw Chipboard Screw Self Tek Screw Drywall Screw Hex roofing Screw Finish:   ZINC, ZINC PLATED, COLOR GALVANIZED Material:   Steel, 1022A Measurement system:   INCH,metric Head Style:   HEX flange Place of Origin:   handan city , China Brand Name:   JK Model Number:8#/10#/12# Product name:   hexagon self drilling screw Head:   HEX head Surface treatment:   Galvanized Packing:  &nbs…