Screw Size: #8 x 1-1/2" Self tapping screws for metal; Thread Dia: #8 (4.2mm); Screw Length (including the height of the head): 1-1/2" Quantity: 100 PCS; Phillips Drive No. #2; Head Diameter: 8.1mm ; Head Height: 2.5mm; Countersunk Degree: 90 degree Material: Stainless Steel 410, great strength and good corrosion resistance to make fasteners last; Great choice for both indoor or outdoor projects Precision-cut threads eliminate deformation risks; Sharp drilling point ensure accurate penetration; Deep Phillips drive groove enhance torque transimission; Ensure its reliable performance for both household maintenance and professional workshop applications Phillips flat head self tapping screws (sheet metal tek screws) are commonly used with metal, wood and other tough materials that are difficult to drill to tap in furniture assembly, manufacturing, building, and other industries (like roofing, metal framing, electrical enclosures, signage installation and more) ; It will save your time and effort by combining drilling and tapping into one operation and provide a strong and secure hold Flat head self tapping screws, are also called sheet metal tek screws are commonly used in indoor and outdoor applications. No exterior finish and no coating, the screws are made of the 410 stainless steel . Automobile, machinery, electronics, assembling, construction, manufacturing industry, indoor and outdoor. RoyceMart specialized in providing full ranges of standard fasteners including fully customized packaging solutions to fulfill our customer's expectation. All products undergoes three level of quality testing and quantity checking before reaching our customers.