3678574 Cummins connecting rod bolt

3678574 – Cummins Connecting Rod Bolt

Product Description

The 3678574 connecting rod bolt is a special mounting bolt used to secure the connecting rod cover to the connecting rods of Cummins large series engines such as ISX15, QSX15, ISX, QSX and X15. The part provides a reliable connection of the lower part of the connecting rod to the cover, which is critical for stable engine operation under high loads.

OEM bolts of this type are made of high-quality hardened steel, which ensures strength, stable fit and long service life.

Key Features

OEM Number: 3678574

Type: Connecting Rod Cap Screw

Application: Cummins ISX15, QSX15, ISX, QSX, X15 Series Engines

Material: Hardened High Carbon/Alloy Steel

Purpose: Provides a secure connection between the connecting rod and the connecting rod cap in the engine assembly

Quantity in Engine: Requires multiple bolts for complete replacement (typically a set of 24) - one bolt is designed for one connecting rod pair (cap + connecting rod).

Applications

The 3678574 bolt is widely used in Cummins heavy-duty diesel engines, including:

ISX15, QSX15, ISX, QSX, X15

Agricultural, Industrial and Trucking

Heavy-duty, high-volume, high-pressure load units