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The Caterpillar 111-4379 Shaft-Tightener is a precision-engineered OEM replacement component designed for 3516E, 3516B, 3516C, and 784C excavators operating in Engine – Industrial and heavy construction environments. Built for structural durability and exact fitment, this shaft-tightener supports critical assemblies to ensure reliable performance and reduced downtime.
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Common Applications
This Caterpillar 111-4379 shaft-tightener is essential for:
Professional maintenance of CAT excavators.
Direct replacement of worn structural and pivot components.
Heavy-duty Engine – Industrial and earthmoving operations.
Maintaining proper alignment in equipment linkage systems.
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Fits The Following Models
CAT 3516E Excavator
CAT 3516B Excavator
CAT 3516C Excavator
CAT 784C Excavator
CAT 777G Excavator
(Verify fitment with your specific serial number.)
Product Details and Availability
In Stock (if confirmed).
Global Shipping Available.
Serial Number Verification Support.
Request Fast Quote for Current Market Pricing.