Caterpillar O-Ring, PAI 321327 (OEM 2303728), Pack of 6
Used In These Kits
This part is included in 3 engine & overhaul kits — find yours below.
Suggested Additional Parts
Commonly sold with this product. These parts are sold separately.
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| Brand | PAI Industries |
| Part Category | Seals & O-Rings |
| Sub-Type | O-Ring |
| Engine Make | Caterpillar |
| Engine Model | 3406E · C15 · C16 · C18 |
| Condition | New |
| Stage / Tier | Standard |
Sold in a pack of 6.
PAI 321327 is an o-ring made from Viton. PAI lists Caterpillar 3406E, C15, C16 and C18 applications. The manufacturer identifies Caterpillar OEM reference 2303728.
Compare the complete part number and listed application with your required part before ordering.
PAI Part #: 321327
OEM References:
- CATERPILLAR 230-3728
- CATERPILLAR 2303728
Applications:
- CATERPILLAR 3406E SERIES
- CATERPILLAR C15 ENGINE
- CATERPILLAR C16 ENGINES
- CATERPILLAR C18 ENGINE
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 |
|---|
| 230-3728 |
| 2303728 |
| CATERPILLAR 230-3728 |
| CATERPILLAR 2303728 |
| PAI 321327 |
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.