Specification Brand : Small Parts BulletPoint1 : Thread cutting screw with type F point has machine screw threads that taper down to a blunt edge and is suitable for heavy gauge sheet metal, aluminum, cast iron, brass, and plastic BulletPoint2 : Steel is often used in applications where strength is the primary consideration BulletPoint3 : Zinc plating resists corrosion and has a black reflective appearance BulletPoint4 : Truss head has an extra-wide low-profile domed shape for applications with minimal clearance BulletPoint5 : Phillips drive has an x-shaped slot that accepts a Phillips driver and is designed to prevent over-tightening Color : black DriveSystem : Phillips ExteriorFinish : Zinc GpsrSafetyAttestation : 1 GradeRating : 18-8 ItemName : Steel Thread Cutting Screw, Black Zinc Plated, Truss Head, Phillips Drive, Type F, #8-32 Thread Size, 1/2" Length (Pack of 100) ItemPackageDimensions_Height : 0.508 centimeters ItemPackageDimensions_Length : 12.7 centimeters ItemPackageDimensions_Width : 12.7 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : thread-forming-and-cutting-screws Manufacturer : Small Parts Material : Steel MeasurementSystem : Imperial MeasurementSystem1 : Imperial MeasurementSystem2 : Metric MetalType : Alloy Steel ModelNumber : 0808FPTBZ NumberOfItems : 100 NumberOfPieces : 10 PackageLevel : unit PartNumber : 0808FPTBZ ProductDescription : Thumb screws are designed to be tightened and loosened by hand. Large head diameter makes it easy to access and tighten. The thumb screw has a straight knurled surface on its head. This gives it better gripping surface, making it easier to tighten or loosen the fastener manually.