Hex head steel&rubber washer self drilling screw 

Hex head steel&rubber washer self drilling screw Hardware Roofing Screws with drill point provides secure metal to wood fastening and eliminates the need to pre-drill. The drill point and flute remove material and accurately size the hole for threads. Great for quick, easy hole starting and strong holding power. The hex head reduces stripping and the self-sealing neoprene washer provides a waterproof seal. Useful for fastening thicker gauge (20-12 ga) exterior metal when a sealing washer is needed. Such as securing metal roofing panels to wood structures.  Self Drilling Screw SELF Tapping Screw Chipboard Screw Self Tek Screw Drywall Screw Hex roofing Screw ZINC, ZINC PLATED Material:   Steel, C1022A Measurement system:   INCH Head Style:   HEX Place of Origin:   handan city , China Brand Name:   JK Model Number:   4.8mm-6.3mm Standard:   DIN item:   roofing screws…