Product Overview Self drilling screws classified under HS Code 731814 are precision-engineered fasteners designed with an integrated drill point that enables them to penetrate metal and other hard substrates without the need for pre-drilling. These screws typically feature dimensions ranging from M3 to M12 in diameter, with lengths varying from 10 mm to 150 mm, manufactured from high-grade carbon steel or stainless steel to ensure corrosion resistance and mechanical strength. The product is further processed through heat treatment and surface coatings such as zinc plating or galvanization to enhance durability and performance in demanding environments. HS Code 731814 encompasses self drilling screws subdivided into categories based on thread type, head style (e.g., pan, hex, countersunk), and material composition, facilitating precise classification for customs and regulatory compliance. Predominantly utilized in the food service, retail infrastructure, and metal processing industries, these screws offer reliable fastening solutions for assembling machinery, structural components, and equipment where efficiency and structural integrity are paramount. Their value proposition lies in reducing installation time and labor costs while maintaining stringent quality standards required in international trade and industrial applications. HS Code Classification & Trade Specifications The HS Code 731814 is structured as follows: Chapter 73 covers “Iron and Steel,” Heading 7318 specifies “Screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter-pins, washers (including spring washers) and similar articles, of iron or steel,” with Subheading 731814 designating “Self drilling screws.” This classification is justified by the product’s integral drill point enabling direct fastening without pilot holes, distinguishing it from other screw types. Trade professionals must note that these screws are commonly packaged in sealed polybags or labeled cartons, with quantities standardized to 1,000 to 5,000 units per package to optimize handling and inventory control. Preservation methods include rust-preventive oil coatings or passivation treatments compliant with ISO 9227 salt spray resistance standards to maintain product integrity during transit. Shipping typically adheres to containerized cargo protocols with moisture barrier liners to prevent corrosion. Conformance to ISO 898-1 mechanical properties and ASTM F2329 standards for self drilling screws ensures international quality benchmarks are met, facilitating customs clearance and adherence to WTO trade agreements. This classification framework supports accurate tariff application, import/export documentation, and compliance verification across global markets.