UCAN's #8 x 1/2 in. Hex-Washer-Head Fine-Thread Sharp-Point Zinc-Plated HVAC Tapping Screws (10,000 Pack) provide a compact fastening option for ductwork, sheet-metal joints, and other compatible HVAC assemblies. The 1/2 in. length is suited to applications where a shorter screw is preferred, helping limit unnecessary penetration through thin-gauge material. A hex head allows efficient installation with compatible nut-driver equipment, and the screw's Twinfast thread design is intended for sheet-metal fastening applications. UCAN lists the UTH812B as a zinc-plated side-lap HVAC screw with a 10,000-piece case quantity and 36 lb. case weight, making it a practical choice for high-volume installation, fabrication, and service operations.