Cat C9 O-Ring, PAI 321459 (OEM 1090074)
Suggested Additional Parts
Commonly sold with this product. These parts are sold separately.
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331655Caterpillar C9 Gasket, PAI (OEM 4N1946), Pack of 1 Ships from supplier · Lead time confirmed when you order -
321221Caterpillar Buna N O-Ring, PAI (OEM 1090078), Pack of 6 Ships from supplier · Lead time confirmed when you order -
341312Cat / Caterpillar OIL PUMP ASSEMBLY Ships from supplier · Lead time confirmed when you order -
340110Caterpillar Stud, PAI (OEM 1061792), Pack of 6 Ships from supplier · Lead time confirmed when you order -
321460Cat C15 O-Ring, PAI (OEM 6V1585), Pack of 2 Ships from supplier · Lead time confirmed when you order
| Engine family | Caterpillar C9 |
| Brand | PAI Industries |
| Part Category | Gaskets & Seals |
| Sub-Type | O-Ring |
| Engine Make | Caterpillar |
| Engine Model | C9 |
PAI 321459 is an o-ring made from HNBR. PAI lists an inside diameter of 3.600 inches and a cross section of 0.210 inches. PAI lists Caterpillar C9 applications and identifies Caterpillar OEM reference 1090074.
Compare the complete part number and listed application with your required part before ordering.
Fits:
- CATERPILLAR C9 ENGINES
OEM cross-references:
- CATERPILLAR 1090074
- CATERPILLAR 109-0074
Warranty: 24 months
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 |
|---|
| CATERPILLAR 1090074 |
| CATERPILLAR 109-0074 |
| PAI 321459 |
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.





