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Caterpillar · Hardware & Fasteners
8S9191
In stock · ships from Knoxville
This is a Caterpillar heavy-duty hex head bolt made from SAE J429 Grade 8 steel (ISO Class 10.9) with a phosphate and oil finish.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
We don't publish fitment for this part yet. Rather than guess, get it confirmed against your truck in under a minute.
It is commonly used as a fuel injector hold-down bolt in Cat diesel engines, providing the high clamp load needed to secure injector clamps against constant vibration. It is typically replaced when threads are damaged, the bolt has stretched, or during injector service to maintain proper torque retention.
Part Number: 8S9191
BOLT
Vendor: STOWERS MACHINERY
Dealer: KP Services Crossville
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