Caterpillar HNBR O-Ring, PAI 321209 (OEM 1142687), Pack of 5
Used In These Kits
This part is included in 41 engine & overhaul kits — find yours below.
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331128Cat / Caterpillar OVERHAUL GASKET KIT In stock -
331129Cummins OVERHAUL GASKET KIT In stock -
331170Cat / Caterpillar 3400 SERIES UPPER GASKET KIT In stock -
331190Caterpillar 3300 / 3304 Upper Gasket And Sealkit In stock -
331191Caterpillar 3300 / 3306 Upper Gasket And Sealkit In stock -
331192Caterpillar 3300 / 3306 Upper Gasket And Sealkit In stock -
331193Cat / Caterpillar 3306 ENGINE UPPER GASKET KIT In stock -
331194Cat / Caterpillar UPPER GASKET KIT In stock -
331195Cat / Caterpillar UPPER GASKET KIT In stock -
331196Caterpillar 3300 / 3306 Upper Gasket Kit In stock -
331197Cat / Caterpillar UPPER GASKET KIT In stock -
331199Cat / Caterpillar UPPER GASKET KIT In stock - 331200UPPER GASKET KIT View ›
- 331201UPPER GASKET KIT View ›
- 331202UPPER GASKET KIT View ›
- 331206UPPER GASKET KIT View ›
- 331220ENGINE OVERHAUL GASKET KIT View ›
- 331228UPPER GASKET KIT View ›
- 331229UPPER GASKET KIT View ›
- 331230UPPER GASKET KIT View ›
- 331231UPPER GASKET KIT View ›
- 331235UPPER GASKET KIT View ›
- 331237UPPER GASKET KIT View ›
- 331238UPPER GASKET KIT View ›
- 331239UPPER GASKET KIT View ›
- 331325TURBOCHARGER INSTALLATION GASKET KIT View ›
- 331328UPPER GASKET KIT View ›
- 331389OIL COOLER GASKET KIT View ›
- 331393TURBOCHARGER MOUNTING GASKET View ›
- 331420REAR GASKET KIT View ›
- 331429INSTALLATION GASKET KIT View ›
- 331430TURBOCHARGER MOUNTING GASKET KIT View ›
- 331449ENGINE OVERHAUL GASKET KIT View ›
- 331562LOWER GASKET SET View ›
- 331564UPPER GASKET KIT View ›
- 331581UPPER GASKET SET View ›
- 331583TURBOCHARGER INSTALLATION KIT View ›
- 331668GASKET KIT View ›
- 331734INSTALLATION GASKET KIT View ›
- 381192TURBOCHARGER View ›
- 381193TURBOCHARGER INSTALLATION KIT View ›
- No kits match that search.
Suggested Additional Parts
Commonly sold with this product. These parts are sold separately.
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331212PAI Turbocharger Gasket for Caterpillar — Pack of 5 In stock -
340061Caterpillar 3406E / C15 / C16 Nut In stock -
340015Caterpillar 3406E / C15 / C16 Screw In stock -
331214Cat Turbo Oil Drain Gasket, PAI (OEM 126-2702), Pack of 5 In stock -
331213Cat / Caterpillar TURBOCHARGER OIL PRESSURE GASKET (Pack of 5) 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 |
PAI 321209 is a hnbr o-ring for Caterpillar applications. PAI specifies HNBR construction. The manufacturer designates product-level OEM 1142687. PAI cross-references Caterpillar 1142687. PAI lists these application categories: Caterpillar 3406E Series, Caterpillar C15 Engine, Caterpillar C16 Engines, Caterpillar C18 Engine. Confirm the complete required part number before ordering.
Pack of 5.
Manufacturer product cross-references
Caterpillar 114-2687
Caterpillar 8T7136
Caterpillar 9M4849
Mack 25623870
Mack 446GC2120
PAI Part #: 321209
OEM References:
- CATERPILLAR 114-2687
- CATERPILLAR 1142687
- CATERPILLAR 8T7136
- CATERPILLAR 9M4849
- MACK 25623870
- MACK 446GC2120
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 |
|---|
| 114-2687 |
| 1142687 |
| 8T7136 |
| 9M4849 |
| 25623870 |
| 446GC2120 |
| CATERPILLAR 114-2687 |
| CATERPILLAR 1142687 |
| CATERPILLAR 8T7136 |
| CATERPILLAR 9M4849 |
| MACK 25623870 |
| MACK 446GC2120 |
| PAI 321209 |
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.

















