Import Cummins Piston Ring 6ct 3802429 — Buy in Bulk from Supplier in Japan

The Cummins piston ring 6CT 3802429 is a direct replacement component designed for Cummins 6CT diesel engines, specifically engineered to maintain compression and control oil consumption under high thermal and mechanical stress. This ring is manufactured to match the original equipment dimensions, with a radial thickness of 1.8 mm, an axial height of 4.5 mm, and a gap clearance of 0.25 to 0.40 mm when installed in a standard 102 mm bore. It is not a generic aftermarket part but a precision-machined component aligned with Cummins OEM engineering tolerances.

The ring is made from ductile iron with a chrome-plated top surface and a molybdenum-coated second groove, typical for heavy-duty diesel applications. The third ring is a standard oil control ring with a helical spring expander, conforming to industry norms for wear resistance and sealing performance. These material choices reflect standard practice in diesel piston ring design, where top rings endure combustion heat and pressure while lower rings manage lubrication. No claims are made about proprietary alloys or heat treatments beyond what is standard for this engine family.

This piston ring is purchased by rebuilders of industrial diesel engines, marine propulsion systems, and agricultural machinery operators in Asia and Eastern Europe. Buyers typically source it in batches of 12 to 48 units for engine overhauls. Trade terms are usually FOB Kobe or CIF destination port, with packaging in original Cummins-branded boxes or neutral polyethylene sleeves. Minimum order quantities are not stated but are typically negotiated based on engine rebuild volume. Buyers should confirm compatibility with their specific 6CT variant, as bore size and ring groove depth can vary slightly across model years.

Construction Machinery Engine Parts Co., Ltd is a supplier based in Himeji, Hyogo, Japan, with a physical address listed at 50, Kamiyobe, Yobe-ku. The company is classified as an imported supplier with harbor trust tier, indicating it has been verified through logistics and documentation checks but has no public response rate or customer interaction history. The listing does not indicate manufacturing capability, warehouse size, or export volume, and no claims are made about years in business, certifications, or client names.

The company appears to function as a distributor or wholesaler of diesel engine components, sourcing parts for export. There is no evidence in the listing of in-house machining, testing equipment, or engineering staff. It does not claim ISO certification or direct OEM authorization. Buyers should treat this as a sourcing intermediary and verify part authenticity and origin independently before shipment.