Caterpillar Silicone O-Ring, PAI 321233 (OEM 5H7704), Pack of 4
Used In These Kits
This part is included in 1 engine & overhaul kits — find yours below.
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331430Cat / Caterpillar TURBOCHARGER MOUNTING GASKET KIT In stock - No kits match that search.
Suggested Additional Parts
Commonly sold with this product. These parts are sold separately.
| Brand | PAI Industries |
| Part Category | Seals & O-Rings |
| Sub-Type | O-Ring |
| Engine Make | Caterpillar |
| Engine Model | 3406E · C15 · C16 · C18 · 3400 |
| Condition | New |
| Stage / Tier | Standard |
PAI 321233 is a silicone o-ring for Caterpillar applications. PAI specifies Silicone construction. The manufacturer designates product-level OEM 5H7704. PAI cross-references Caterpillar 5H7704. PAI lists these application categories: Caterpillar 3406E Series, Caterpillar C15 Engine, Caterpillar C16 Engines, Caterpillar C18 Engine, Caterpillar 3400 Series. Confirm the complete required part number before ordering.
Pack of 4.
Manufacturer product cross-references
Caterpillar 6L8166
Caterpillar 7M2089
Caterpillar 8T7146
PAI Part #: 321233
OEM References:
- CATERPILLAR 5H7704
- CATERPILLAR 6L8166
- CATERPILLAR 7M2089
- CATERPILLAR 8T7146
Applications:
- CATERPILLAR 3406E SERIES
- CATERPILLAR C15 ENGINE
- CATERPILLAR C16 ENGINES
- CATERPILLAR C18 ENGINE
- CATERPILLAR 3400 SERIES
Warranty: 2.0 year(s)
These catalog references may identify this part or components in an assembly. A listed number alone does not confirm whole-assembly interchange or vehicle fitment. Confirm the required part before ordering.
| Number |
|---|
| 5H7704 |
| 6L8166 |
| 7M2089 |
| 8T7146 |
| CATERPILLAR 5H7704 |
| CATERPILLAR 6L8166 |
| CATERPILLAR 7M2089 |
| CATERPILLAR 8T7146 |
| PAI 321233 |
No cross-reference numbers match that search.
Discovery models are listed below. Confirm the complete application and any ESN/CPL or size restrictions before ordering.
Most PAI parts carry a 2-year unlimited-mileage PAI warranty — 3 years on the High Performance tier, 1 year on Excel by PAI. See Warranty & Returns for full coverage terms, or call a specialist to confirm the exact coverage on this part.
PAI published warranty tiers: High Performance — 3-Year · Genuine PAI — 2-Year · Excel — 1-Year, unlimited mileage. The badge beside the price shows this product's recorded term; when no badge is shown, confirm coverage with a specialist.






