Specification Brand : PRIME-LINE BulletPoint1 : Size: #4-40 X 1/2 inch BulletPoint2 : Hex (Allen) Drive BulletPoint3 : Installs using an Allen wrench BulletPoint4 : Can be used in tight spaces where there may not be room for a socket tool or wrench BulletPoint5 : Often used in machinery, tools and dies BulletPoint6 : Thread Type: Coarse, Thread Class: UNC-3A, Point Style: Blunt BulletPoint7 : Specification(s) Met: ASME B18.3 and ASTM A574 Color : Black Oxide DriveSystem : External Hex ExteriorFinish : Black Oxide ExternallyAssignedProductIdentifier1 : 049793188663 ExternallyAssignedProductIdentifier2 : 0049793188663 ExternallyAssignedProductIdentifier3 : 00049793188663 GpsrSafetyAttestation : 1 ItemName : Prime-Line 9177001 Socket Head Cap Screws, Hex (Allen) Drive, #4-40 X 1/2 in, Black Oxide (25 Pack) ItemPackageDimensions_Height : 16 centimeters ItemPackageDimensions_Length : 0.6 centimeters ItemPackageDimensions_Width : 10.1 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : socket-cap-screws Manufacturer : Prime-Line ManufacturerGrade : standard Material : Alloy Steel MaximumShearStrength : 205 MPa MeasurementSystem : Imperial MetalType : Alloy Steel ModelName : 9177001 ModelNumber : 9177001 NumberOfItems : 25 NumberOfPieces : 25 PartNumber : 9177001 ProductDescription : Designed with hex socket head and stainless steel material. Fixing component, industrial and construction fasteners. Fixing component, industrial and construction fasteners. Used widely in the home, office and factory appliance, communication equipments, ship assembly and other machinery industry.