Caterpillar Buna N O-Ring, PAI 321244 (OEM 4J5477), Pack of 5
Used In These Kits
This part is included in 6 engine & overhaul kits — find yours below.
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331220Caterpillar 3100 / C7 / 3116 Engine Overhaul Gasket Kit In stock -
331327Caterpillar 3100 / C7 / 3116 Fuel Pump Gasket Kit In stock -
331328Cat / Caterpillar UPPER GASKET KIT In stock -
331515Cat / Caterpillar FRONT COVER GASKET KIT In stock -
331517Cat / Caterpillar COMPRESSOR GASKET KIT In stock -
331581Cat / Caterpillar UPPER GASKET SET In stock - No kits match that search.
Suggested Additional Parts
Commonly sold with this product. These parts are sold separately.
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331313Caterpillar 3100/C7 Block Side Cover Gasket, PAI (OEM 4Y9652), Pack of 3 In stock -
040104Cummins ISX Valve Cover Isolator, PAI (OEM 3104388), Pack of 4 In stock -
050741Cummins EGR Differential Pressure Sensor, PAI (OEM 4921728), Pack of 1 In stock -
132058Cummins ISX Upper Gasket Kit, PAI (OEM 4352145) In stock -
331326Cat / Caterpillar WATER PUMP GASKET KIT In stock
| Brand | PAI Industries |
| Part Category | Seals & O-Rings |
| Sub-Type | O-Ring |
| Engine Make | Caterpillar |
| Engine Model | 3100 · C7 |
| Condition | New |
| Stage / Tier | Standard |
PAI 321244 is a buna n o-ring for Caterpillar applications. PAI specifies Buna N construction. The manufacturer designates product-level OEM 4J5477. PAI cross-references Caterpillar 4J5477. PAI lists these application categories: Caterpillar 3100 Series, Caterpillar C7 Engine. Confirm the complete required part number before ordering.
Pack of 5.
Manufacturer product cross-references
Caterpillar 199-1900
Caterpillar 1991900
Caterpillar 7R3745
Caterpillar 8C3085
Caterpillar 99-5871
Caterpillar 995871
Caterpillar 3E6760
PAI Part #: 321244
OEM References:
- CATERPILLAR 199-1900
- CATERPILLAR 1991900
- CATERPILLAR 4J5477
- CATERPILLAR 7R3745
- CATERPILLAR 8C3085
- CATERPILLAR 99-5871
- CATERPILLAR 995871
- CATERPILLAR 3E6760
Applications:
- CATERPILLAR 3100 SERIES
- CATERPILLAR C7 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 |
|---|
| 199-1900 |
| 1991900 |
| 4J5477 |
| 7R3745 |
| 8C3085 |
| 99-5871 |
| 995871 |
| 3E6760 |
| CATERPILLAR 199-1900 |
| CATERPILLAR 1991900 |
| CATERPILLAR 4J5477 |
| CATERPILLAR 7R3745 |
| CATERPILLAR 8C3085 |
| CATERPILLAR 99-5871 |
| CATERPILLAR 995871 |
| CATERPILLAR 3E6760 |
| PAI 321244 |
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.











