Specification Brand : SG TZH BulletPoint1 : RUGGED AND DURABLE - SG TZH Hex bolt made of high-quality 18-8(304)Stainless Steel,which has higher corrosion resistance and anti-rust effect than ordinary bolt, longer service life, not easy to damage, more solid. BulletPoint2 : Product Size - Thread Diameter: 5/16"; Thread Pitch: 1/18"; Screw Length: 1-1/4". Head Diameter: 0.492". Please check specfication by picture 2 BulletPoint3 : Bolt that meet ASME specifications comply - Hex bolt can be widely used in the home and office appliance, communication equipments, ship assembly , the mechanical industry and small repairs around shops, garages or home furniture fasteners. BulletPoint4 : VALUE PACKAGING AND EASY TO USE - Package includes 20Pcs each of bolts, hex nuts , Flat & Lock washers BulletPoint5 : INTIMATE SERVICE - SG TZH focus on customer satisfaction, if you have any questions or are not satisfied, you can contact us by email, we will solve all your problems as soon as possible. Color : Black DriveSystem : Slotted ExteriorFinish : Black Oxide ExteriorFinish1 : Zinc ExteriorFinish2 : Yellow Zinc ExternallyAssignedProductIdentifier : 9145253131543 ExternallyAssignedProductIdentifier1 : 753252183860 ExternallyAssignedProductIdentifier2 : 0753252183860 FinishType : Plain GradeRating : Grade 8 ItemName : 5/16-18 x 1-1/4" Hex Head Screw Bolt, Nuts, Flat & Lock Washers, 20Pcs 18-8 (304) Stainless Steel, Fully Threaded, Black Oxide by SG TZH ItemPackageDimensions_Height : 14.605 centimeters ItemPackageDimensions_Length : 6.7056 centimeters ItemPackageDimensions_Width : 8.7884 centimeters ItemPackageQuantity : 20 ItemShape : Irregular Shape ItemTypeKeyword : hex-bolts Manufacturer : SG TZH ManufacturerGrade : Grade A574 Material : Stainless Steel MetalType : Carbon Steel MetalType1 : Zinc MetalType2 : Carbon Steel MetalType3 : Alloy Steel NumberOfItems : 20 NumberOfPieces : 20 PartNumber : Hex Bolt -Black-4in1 ProductDescription : 1 ProductSiteLaunchDate : 2023-07-21T07:56:35.092Z Size : 5/16-18 x 1-1/4" SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredHasProductIdentifierExemption : 1 UnitCount : 20 UnspscCode : 31161500