Import Diesel Injection - Diesel Plunger — Buy in Bulk from Supplier in China

The diesel plunger is a precision-machined component used in fuel injection pumps for medium- and heavy-duty diesel engines, designed to meter and deliver fuel under high pressure. Based on the supplier’s listing, it is compatible with common diesel engine models used in commercial vehicles and agricultural machinery, with dimensions and tolerances consistent with standard injection pump systems. The plunger operates within the fuel pump’s barrel assembly, converting rotary motion into precise linear fuel delivery.

The component is typically manufactured from high-carbon chromium steel, hardened and ground to a surface finish of Ra 0.2 μm or better to ensure minimal friction and wear. Typical industry tolerances for the plunger diameter range between 6.0 mm and 10.0 mm, with a concentricity tolerance of 0.003 mm. Surface hardness usually falls between 58 and 62 HRC, a standard for longevity under high-cycle loading. The plunger may be coated with chrome or nitride for enhanced corrosion resistance, though the supplier does not specify coating type.

This part is commonly sourced by diesel engine rebuilders, agricultural equipment distributors, and commercial vehicle maintenance facilities. Buyers typically require batch quantities of 50 to 500 units, with packaging in anti-corrosion paper or plastic sleeves inside cartons. Trade terms are commonly FOB or CIF from a Chinese port, though exact incoterms and lead time are not confirmed in the listing. Buyers should verify compatibility with their pump model before ordering.

China Lutong Parts Plant is an imported-tier supplier based in Dufeng Village, Hanjiang District, Putian, China, with no public information on company history, workforce size, or revenue. The supplier’s trust tier is listed as harbor, indicating basic verification through port-based trade channels. There is no public record of certifications, response rate, or average reply time, suggesting limited buyer interaction or digital engagement.

The supplier specializes in diesel injection components, as evidenced by the product listing, but provides no details on production capacity, testing facilities, or client base. It does not claim OEM partnerships, certifications, or export volume. Buyers should treat this as a factory-level source without verified quality systems and confirm all technical specifications directly before placing orders.