Specification Brand : Renovators Supply Manufacturing BulletPoint1 : Best quality and Durable - This Hex Head Lag Screw made by Zink plated Steel to use both indoor and outdoor, Zinc plated surfaces are rust resistant. They have performance to instantly penetrate in high hardness and good toughness. Zinc plated surface also prevents corrosion and oxidation in both fresh and saltwater appliances. BulletPoint2 : Dimension - It has 0.3125-inches lag screws and 4-inch long. The lag type screw helps to make strong bonding and prevents stripping in materials. There is only one unit. Find the sizing option to get more quantity. Thank You! BulletPoint3 : This black zinc plated lag bolt is typically used for joining two pieces' wood or metal plate on wood. No need pre-drilling on wood surfaces. But if you want to join with metal object, you need pre-drilling. If the drilling is more than Bolt, can use washer. BulletPoint4 : Hex Lag bolt has deep wood screw threads and does not accept a nut. To install it, need a wrench or pliers set to drive onto the wood. BulletPoint5 : Renovator supplier is highly proud to finish and package this fastener ensuring quality and durability. You can purchase it with full trust. Color : Black CustomerPackageType : 1 DriveSystem : External Hex ExteriorFinish : Black Zinc,Zinc,Steel ExternallyAssignedProductIdentifier : 00843728123602 ExternallyAssignedProductIdentifier1 : 096962412166 ExternallyAssignedProductIdentifier2 : 0096962412166 ExternallyAssignedProductIdentifier3 : 00809486174164 GpsrSafetyAttestation : 1 GradeRating : ASTM A307 ItemName : Renovators Supply Manufacturing Steel 5/16 X 4 Inches Lag Bolts Screw with Black Zinc Plated, Hex Head Leg Screw-(1 Unit), Imperial Measurement and External Hex System ItemPackageDimensions_Height : 13.716 centimeters ItemPackageDimensions_Length : 2.54 centimeters ItemPackageDimensions_Width : 3.302 centimeters ItemPackageQuantity : 1 ItemShape : Hexagonal Head ItemTypeKeyword : lag-screws Manufacturer : Renovators Supply Manufacturing Material : Steel, Zinc Plated MeasurementSystem : Imperial MetalType : Bronze MetalType1 : Zinc MetalType2 : Alloy Steel ModelName : 1CTX178 ModelNumber : 1CTX178 NumberOfItems : 1 NumberOfPieces : 1 PartNumber : 21949 Pattern : Hex Head ProductDescription : A Hex Lag Screw, also called a lag bolt, is a full-bodied threaded bolt with a hex head, spaced threads and a gimlet point. They are used mainly in wood construction. Galvanized plating protects the bolt from corrosion; typically used in outdoor applications. ProductSiteLaunchDate : 2016-06-14T21:17:57.375Z Size : Pack of 1 SkipOffer : 1 Style : Lag SupplierDeclaredDgHzRegulation : not_applicable UnitCount : 1 UnspscCode : 31161500