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Product Name: Electro Galvanized Assembled Helical Screw Twist Shank Roofing Nails Model NO.: BWG9 Type: Roofing Nail Material: Low Carbon Steel Head Style: Oval Head,Flat Head Shank: Twisted Size: 4mmx60mm 4mmx75mm Finish: Galvanized/Hot Dipped/Colorful Plating/Red/Blue Trademark: MZ Transport Package: Standard Export Package Specification: SGS Origin: Qingdao, China HS Code: 73170000 Product Description Electro Galvanized Assembled Helical Screw Twist Shank Roofing NailsMaterials: Q195,Q235Head:Oval head,Flat headShank: screw shank,Spiral shankPoint: diamond point Surface:galvanised Packing: according to your requestSpecificationLength(mm)ShankDiameter(mm)Head Diameter(mm)BWG 8*2"50.84.1920BWG 8*2-1/2"63.54.1920BWG 8*3"76.24.1920BWG 9*1-1/2"38.13.7320BWG 9*1-3/4"44.53.7320BWG 9*2"50.83.7320BWG 9*2-1/2"63.53.7320BWG9*3"76.23.7320BWG10*1-3/4"44.53.3720BWG10*2"50.83.3720BWG10*2-1/2"63.53.3720BWG11*1-1/2"38.13.0218BWG11*1-3/4"44.53.0218BWG11*2"50.83.0218BWG11*2-1/2"63.53.0218BWG12*1-1/2"38.12.7418BWG12*1-3/4"44.52.7418BWG12*2"50.82.7418BWG13*1-3/4''44.52.4115BWG13*2''50.82.4115BWG13*2-1/2''63.52.4115BWG13*3''76.22.4115Application: Roofing Screw Nails are widely used for jointing wood, roof board, roofing sheet and tightening wood or iron sheet.