Specification Brand : Acorn International BulletPoint1 : Best for metal-to-wood screws. BulletPoint2 : Self-piercing tapping screws forged from heat treated steel, case hardened for roofing and siding applications. BulletPoint3 : A hex washer head with assembled EPDM washer allows for easy driving and adapts to the metal surface for a secure and long-lasting seal. BulletPoint4 : Twin lead type 17 point and Hi-Lo threads provide a faster drive time and stronger resistance to pullout. BulletPoint5 : All screws are 1000 hour salt spray test dacro-coated. Color : Steel CustomerPackageType : 1 DriveSystem : Phillips ExteriorFinish : Aluminum,Metal,Steel ExternallyAssignedProductIdentifier1 : 767674904736 ExternallyAssignedProductIdentifier2 : 810468001484 ExternallyAssignedProductIdentifier3 : 0810468001484 ExternallyAssignedProductIdentifier4 : 0767674904736 ExternallyAssignedProductIdentifier5 : 00810468001484 ItemName : Acorn Wood-Metal Roofing Screws #12 x 2.5", Galvanized Steel, Bag of 250 Pieces ItemPackageDimensions_Height : 29.5 centimeters ItemPackageDimensions_Length : 8.4 centimeters ItemPackageDimensions_Width : 23.6 centimeters ItemPackageQuantity : 1 ItemShape : Shape ItemTypeKeyword : wood-screws Manufacturer : Acorn International Material : Alloy Steel MeasurementSystem : Imperial MetalType : Stainless Steel MetalType1 : Aluminum MetalType2 : Alloy Steel ModelName : S-WM12212G250 ModelNumber : S-WM12212G250 NumberOfItems : 1 NumberOfPieces : 250 PackageLevel : unit PartNumber : S-WM12212G250 ProductDescription : DECK SCREWS ARE SPECIALIZED FASTENERS DESIGNED TO RESIST CORROSION IN ADVERSE OUTDOOR ENVIRONMENTAL CONDITIONS. The deck screw drives easily into deck boards, and once set, the head lays smoothly against the deck surface. Deck screws feature a Robertson Drive, also known as a Square, or Scrulox drive which has a square shaped socket in the screw head for high torque and minimal slippage. Since wood decks have many thin planks and must withstand harsh environmental conditions, deck screws are designed to accommodate the challenges of this application. They must resist corrosion, drive easily, and lay smoothly against the deck surface, called countersinking. For these reasons, many deck screws are self-countersinking, self-drilling, and coated with materials that won't rust. Like other screws, deck screws come in a wide variety of lengths and widths, called shanks. They also use different shapes of driver, the part on the screw head that allows a screwdriver to dig in to the wood and rotate. A popular head shape is a square, because it holds the driver and doesn't strip as easily as Phillips heads. One feature of deck screws that makes them easy to install is the sharpness of their point. They often come to a very sharp, narrow point, to reduce the necessity of drilling pilot holes. Especially in a soft deck wood like cedar, these screws can be fastened without needing to pre-drill the hole, called self-tapping. Secondly, screws designed for a deck will propel themselves into place because of their unique shank design. The thread of the screw is measured in degrees, so a shallower degree means more thread along the length. These threads spread out the force, so the screw takes less effort to put in, yet it is still difficult to pull out. Some types of deck screws are lubricated so they slide into the wood even more easily. ProductSiteLaunchDate : 2012-12-22T08:47:35.496Z Scent : scent Size : #12 x 2.5" SupplierDeclaredDgHzRegulation : not_applicable UnitCount : 1 UnspscCode : 31161500