Specification Brand : Hillman BulletPoint1 : Coupling nuts are threaded fasteners for joining two male threads, most commonly threaded rod BulletPoint2 : Coupling Nuts are used to make up long rod assemblies from shorter lengths of rods BulletPoint3 : Steel/Zinc Plated BulletPoint4 : Country of Origin: China BulletPoint5 : Thread Size: M5 / 0.2"(D) Color : Silver DriveSystem : External Hex ExteriorFinish : Zinc ExternallyAssignedProductIdentifier1 : 008236416053 ExternallyAssignedProductIdentifier2 : 0008236416053 ExternallyAssignedProductIdentifier3 : 00008236416053 FinishType : Silver GradeRating : commercial ItemName : Hillman 4377 5/8 Hex Coupling Nut Fine Thread (5-Pack) ItemPackageDimensions_Height : 8.4 centimeters ItemPackageDimensions_Length : 3.7 centimeters ItemPackageDimensions_Width : 4.8 centimeters ItemPackageQuantity : 1 ItemShape : Rod ItemTypeKeyword : coupling-nuts Manufacturer : The Hillman Group Material : Steel MeasurementSystem : Inch MetalType : Alloy Steel ModelNumber : 4377 NumberOfItems : 5 NumberOfPieces : 5 PackageLevel : unit PartNumber : 4377 ProductDescription : Female thread, construction for greater durability, ensure reliable connection. Connect conveniently with the quick coupler. All Connectors are fully threaded internally. Connectors are used to connect two threaded parts together.