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Roofing Screw Hex Flange With Rubber Washer Hex EPDM Washer Head Self Drilling Screw Material: C1022/1022A Head type: wafer, countersunk, pan, framing, bugle, combination Surface Treatment: White/Yellow Zinc Plated. Thread: fine thread Diameter: 4.2mm Length: 9.5mm to 55mm Point: TEK Drill point, Sharp point, Standard: DIN / ISO / GB Packing: Bulk packaging in woven bag or carton, Color box & carton packaging Logo: If you need, we can provide logo customization servic Delivery time: Normally in 15-30 days Payment term: 30% TT in advance and 70% TT before shipment Usage: Building construction, decoration field, wooden furniture, electrical component, household etc