Specification Brand : SPAX BulletPoint1 : Check out our Threads!! Our patented thread technology allows the screw to be driven faster, is easier to install, and reduces splitting in wood. Let SPAX take some of the hassle out of your next project. BulletPoint2 : Heat Treated Grade 5 Durability. Subjecting the screw to heat treating gives greater strength and reduces breakage. BulletPoint3 : No required pre-drilling in wood. Be more efficient on the job by eliminating time consuming steps with self drilling SPAX. BulletPoint4 : Unidrive is a( Phillips/Square combo) drive system for the SPAX fastener. The user has the option of either using a Phillips drive bit or a square drive bit for installation. BulletPoint5 : Patented MULTIhead countersinks the screw head flush in wood. Keep a smooth surface on your project for greater design and functional qualities. Color : Silver DriveSystem : Phillips and Square ExteriorFinish : Zinc ExternallyAssignedProductIdentifier1 : 712216012998 ExternallyAssignedProductIdentifier2 : 0712216012998 ExternallyAssignedProductIdentifier3 : 00712216012998 GpsrSafetyAttestation : 1 GradeRating : grade_ 5 ItemName : SPAX #8 x 1-1/2in. Flat Head Unidrive Zinc Coated Screw - 1 LB Box ItemPackageDimensions_Height : 4.57 centimeters ItemPackageDimensions_Length : 11.94 centimeters ItemPackageDimensions_Width : 8.89 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : machine-screws Manufacturer : Spax Material : Carbon Steel MaximumShearStrength : 220 N·m/mm² MeasurementSystem : Imperial MeasurementSystem1 : Imperial MeasurementSystem2 : Metric MetalType : Carbon Steel ModelNumber : 4101010400406 NumberOfItems : 1 NumberOfPieces : 50 PartNumber : 4101010400406 ProductDescription : Descriptions: Stainless steel countersunk phillips head screw used extensively where insulation is needed. Widely used in electronics, communication, equipment, electric power products, cultural goods, environmental protection machinery, etc. Fixing component, industrial and construction fasteners.