Import Diesel Plunger Barrel A503675 — Buy in Bulk from Supplier in China

The Diesel Plunger Barrel A503675 is a replacement component for high-pressure diesel injection systems, commonly used in Perkins, Cummins, and Yanmar engines. It is machined from forged alloy steel with a precision-ground internal bore of 8.000 mm ±0.003 mm and an overall length of 89.2 mm. The part is designed to interface with plunger elements of matching diameter and stroke profile, ensuring consistent fuel delivery under high-pressure conditions.

This barrel is typically manufactured from AISI 4140 or equivalent material, heat-treated to achieve a core hardness of 30-35 HRC and a surface hardness of 58-62 HRC after nitriding. The surface finish of 0.25 micrometers Ra meets industry norms for fuel injection components. Unlike some chrome-plated alternatives, this barrel uses a black oxide coating to reduce friction and provide short-term corrosion resistance. The grooves and inlet ports are machined to tolerances of ±0.01 mm to maintain fuel flow characteristics.

This part is frequently sourced by diesel repair shops, fleet maintenance providers, and OEM aftermarket distributors in Africa, the Middle East, and South America. Packaging consists of 8 units per carton, each wrapped in anti-rust paper with a unique batch number. Lead time is typically 20 to 30 days. Buyers should confirm whether the barrel is intended for rebuild kits or direct replacement, as some variants require matching plungers for optimal performance.

Chen Chen Diesel Parts Plant operates from Fuzhou, Fujian Province, and specializes in manufacturing diesel fuel injection components including plunger barrels, delivery valves, and nozzles. The supplier is listed as an imported tier with harbor trust status, indicating verified export activity and compliance with basic customs documentation. There is no public information on factory size, workforce, or years in operation, and no certifications such as ISO 9001 are claimed in the listing.

The supplier does not provide test reports, material certificates, or traceability data for individual batches. While the description mentions export to 'various countries,' no specific markets or clients are named. Response rates and average reply times are not available, suggesting limited buyer communication support. Buyers should treat this as a direct manufacturer without third-party quality verification and request physical samples before large orders.