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Fitzgerald Truck · Hardware & Fasteners
21138
In stock · ships from Knoxville
These are high-strength mounting bolts used to secure Jake brake (compression release engine brake) housings to the cylinder head or rocker arm assembly on heavy-duty diesel engines.
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.
The bolts are exposed to extreme vibration, heat, and oil, which can lead to loosening, stretching, or fatigue over time. Replacing them with the correct bolts restores proper clamping force, prevents oil leaks, and maintains reliable engine braking performance.
Part Number: 21138
JAKE HOUSING BOLTS
Vendor: Fitzgerald Truck
Dealer: KP Services Crossville
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