Caterpillar Buna N O-Ring, PAI 321218 (OEM 4J7533), Pack of 5
Used In These Kits
This part is included in 8 engine & overhaul kits — find yours below.
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331234Cat / Caterpillar 3400 SERIES UPPER GASKET KIT In stock -
331237Cat / Caterpillar 3400 SERIES UPPER GASKET KIT In stock -
331238Cat / Caterpillar 3400 SERIES UPPER GASKET KIT In stock -
331239Cat / Caterpillar 3400 SERIES UPPER GASKET KIT In stock -
331240Cat / Caterpillar 3400 SERIES UPPER GASKET KIT In stock -
331561Cat / Caterpillar 3176 SERIES UPPER GASKET KIT In stock -
331624Gasket and Seal Kit In stock -
331626Caterpillar 3176 / 3176C 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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321209Caterpillar HNBR O-Ring, PAI (OEM 1142687), Pack of 5 In stock -
331369Caterpillar 3406E/C15/C16/C18 Air Inlet Gasket, PAI (OEM 1013125), Pack of 5 In stock -
331210Caterpillar 3406E Segmented Oil Pan Gasket, PAI (OEM 4N1151), Pack of 2 In stock -
331272Caterpillar 3406E/C15/C16/C18 Cylinder Block Plate Gasket, PAI (OEM 2271204), Pack of 1 In stock -
321276Caterpillar O-Ring, PAI (OEM 2147568), Pack of 10 In stock
| 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 321218 is a buna n o-ring for Caterpillar applications. PAI specifies Buna N construction. The manufacturer designates product-level OEM 4J7533. PAI cross-references Caterpillar 4J7533. 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 5.
Manufacturer product cross-references
Caterpillar 077-3520
Caterpillar 109-0093
Caterpillar 1090093
Caterpillar 773520
PAI Part #: 321218
OEM References:
- CATERPILLAR 077-3520
- CATERPILLAR 109-0093
- CATERPILLAR 1090093
- CATERPILLAR 4J7533
- CATERPILLAR 773520
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 |
|---|
| 077-3520 |
| 109-0093 |
| 1090093 |
| 4J7533 |
| 773520 |
| CATERPILLAR 077-3520 |
| CATERPILLAR 109-0093 |
| CATERPILLAR 1090093 |
| CATERPILLAR 4J7533 |
| CATERPILLAR 773520 |
| PAI 321218 |
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.