Caterpillar O-Ring, PAI 321284 (OEM 2303775), Pack of 6
Used In These Kits
This part is included in 4 engine & overhaul kits — find yours below.
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321285Caterpillar 3406E/C15/C16/C18 Fuel Injection O-Ring Kit, PAI (OEM 2481394), Pack of 1 In stock -
331166Caterpillar C15 In-Frame Gasket Kit In stock -
331170Cat / Caterpillar 3400 SERIES UPPER GASKET KIT In stock -
331414Cat / Caterpillar 3400 SERIES FUEL GASKET KIT In stock - No kits match that search.
Suggested Additional Parts
Commonly sold with this product. These parts are sold separately.
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321282Caterpillar O-Ring, PAI (OEM 9X7317), Pack of 6 In stock -
321327Caterpillar O-Ring, PAI (OEM 2303728), Pack of 6 In stock -
321283Caterpillar O-Ring, PAI (OEM 9X7418), Pack of 6 In stock -
321266Caterpillar O-Ring, PAI (OEM 9X7430), Pack of 6 In stock -
340061Caterpillar 3406E / C15 / C16 Nut In stock
| 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 |
Pack of 6.
PAI 321284 is an o-ring. PAI lists Viton material. The listed durometer is 90. Listed cross section is 0.139 inch. Listed inside diameter is 1.421 inches. The manufacturer designates product-level OEM 2303775.
Compatible Engines
PAI lists Caterpillar 3406E Series; Caterpillar C15 Engine; Caterpillar C16 Engines; Caterpillar C18 Engine. Match the complete required part number and listed application before ordering.
Manufacturer product cross-references
Caterpillar 230-3775
Caterpillar 2303775
Caterpillar 9X7419
Compare the complete part number, material and required seal specification before ordering.
PAI Part #: 321284
OEM References:
- CATERPILLAR 230-3775
- CATERPILLAR 2303775
- CATERPILLAR 9X7419
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 |
|---|
| 230-3775 |
| 2303775 |
| 9X7419 |
| CATERPILLAR 230-3775 |
| CATERPILLAR 2303775 |
| CATERPILLAR 9X7419 |
| PAI 321284 |
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.