Product Overview The brake master cylinder, classified under HS Code 870830, is a critical component within automotive braking systems responsible for converting mechanical force into hydraulic pressure to actuate the vehicle’s brake calipers or wheel cylinders. Typically constructed from high-grade cast aluminum or steel alloys, these cylinders exhibit precise machining tolerances to ensure optimal hydraulic fluid containment and pressure generation. The product features multiple ports for brake fluid input and output, integrated piston assemblies, and corrosion-resistant surface treatments to enhance durability and performance under variable operating conditions. Under HS Code 870830, the brake master cylinder falls within the broader category of parts and accessories for motor vehicles, specifically sub-classified under braking system components. Its commercial applications extend across automotive manufacturing, aftermarket replacement, and vehicle maintenance sectors, serving passenger cars, commercial trucks, and industrial machinery. Market positioning is underscored by compliance with stringent automotive standards such as ISO/TS 16949, providing reliable performance, safety assurance, and compatibility with international vehicle specifications. HS Code Classification & Trade Specifications The brake master cylinder is classified under the Harmonized System (HS) Code 870830, where ‘87’ denotes Chapter 87: Vehicles other than railway or tramway rolling stock, ‘08’ specifies Heading 8708: Parts and accessories of the motor vehicles of headings 8701 to 8705, and ‘30’ identifies the subheading for braking system components. This classification is justified by the product’s integral function within the vehicle’s hydraulic braking mechanism, distinguishing it from other automotive parts such as engines or electrical components. Trade considerations include packaging in corrosion-resistant containers or sealed plastic to prevent fluid contamination and moisture ingress, with bulk or unitized shipments secured to minimize mechanical damage during transit. Preservation techniques comply with international standards to maintain product integrity, including desiccants and protective coatings. Quality standards adhere to ISO 9001 and relevant regional automotive regulations to ensure conformity with global trade and customs requirements. Documentation typically mandates precise identification of material composition, manufacturing origin, and compliance certifications to facilitate customs clearance and tariff assessment under WTO guidelines.