Overview – Hydraulic Parts PLUGASY 3377347
3377347 is the nut and plug assembly used on CUMMINS engines to seal oil passages in the block and cylinder head. We can supply this plug assembly as well as the related sealing components, in stock or available on order – welcome to enquire by part number.
Parts Characteristics
The assembly is built to the original plug and nut arrangement, with the tapered plug thread and the nut matched to the CUMMINS port specification. The plug seals the oil passage under engine pressure, and the nut provides a positive drive and locking surface. The materials are selected for the oil and temperature service of the engine. As an OEM-spec assembly, it threads into the original port without adapters.
Applicable Models & Applications
This nut and plug assembly is used on CUMMINS engines where the oil passage ports match the original specification, including the ISLe, ISMe, B-series and related engine families fitted with the 3377347 plug. Confirm the thread size, taper and port location against the plug removed from your engine before ordering.
Maintenance & Replacement
A leaking plug shows up as oil seepage around the port, low oil pressure and oil stains on the block. Inspect the plug threads and sealing face whenever the engine is opened for service. When replacing, clean the port threads, fit the new plug with the original sealing method, and tighten to the specified torque. Run the engine and check the port for leaks under pressure.
Price Reference (USD)
The reference price for this PLUGASY (3377347) is approximately USD 5 – 40 per unit depending on grade, quantity and shipping destination. This is a planning estimate only – confirm current pricing and availability with our sales team before ordering.
Value & Service
A plug with the wrong taper can strip the port threads, so we verify 3377347 against the original CUMMINS port specification before dispatch. We stock the plug together with the gaskets and sealing washers, and they can ship in one tracked order. Our team will confirm the correct plug for your engine before you buy.
Racer Machinery is a dedicated construction-machinery parts supplier – send us your part number and engine model, and we will confirm fitment, price and lead time for this plug assembly and related CUMMINS sealing components.
