Import Diesel Fuel Plunger & Barrel 7w5929 — Buy in Bulk from Supplier in China

The Diesel Fuel Plunger & Barrel 7W5929 is a precision-engineered component designed for use in Caterpillar diesel injection systems. It is manufactured from high-carbon chrome steel, hardened to HRC 58-62, with a surface finish of Ra 0.2 micrometers to ensure low friction and wear resistance. The plunger diameter is 8.5 mm with a tolerance of ±0.002 mm, matching OEM dimensional standards for direct replacement. This unit is supplied new, not refurbished, and is marked with the model number 7W5929 for traceability.

This component is typically used in high-pressure fuel injection pumps where precise metering and sealing are critical. The barrel is machined to maintain concentricity within 0.003 mm and is ground to a bore tolerance of IT6. The material composition conforms to standard DIN 1.3505 or equivalent, commonly used in diesel injector components. Surface hardening through nitriding is standard in this application to enhance fatigue life under cyclic loading. No plating or coating is applied beyond the base material treatment.

Buyers typically include diesel engine rebuilders, heavy equipment maintenance shops, and aftermarket parts distributors serving agricultural, marine, and construction sectors. The unit is packed in a single carton with internal foam cushioning and labeled with the model and supplier code. Minimum order quantity is one unit, and the product carries a six-month warranty against material or manufacturing defects. Shipment is available FOB Putian port, with lead time confirmed upon order placement.

Dia Diesel Injection Imp & Exp Company operates from Putian, Fujian, and specializes in diesel fuel injection components for commercial and industrial engines. The company is verified as a harbor-tier supplier with no public data on production capacity, workforce size, or export history. Its listing shows no certifications, no client list, and no claims about years in business. The address provided is consistent with local industrial zones in Fujian known for fuel system part manufacturing.

There is no evidence in the listing of in-house machining, heat treatment, or quality control labs. The supplier does not claim ISO certification, OEM partnerships, or testing equipment. All product data is presented as sourced or assembled. Buyers should request material test reports and dimensional inspection certificates before placing orders. Response rate and average response time are not tracked in the system, indicating limited buyer support infrastructure.