Caterpillar O-Ring, PAI 321386 (OEM 7L6580), Pack of 4
Used In These Kits
This part is included in 13 engine & overhaul kits — find yours below.
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331470-153Caterpillar C13 Coolant System Gasket Kit In stock -
331473-153Caterpillar C13 Coolant System Gasket Kit In stock -
331479Cat / Caterpillar WATER PUMP GASKET SET In stock -
331512Cat / Caterpillar OIL COOLER GASKET KIT In stock -
331543Cat / Caterpillar C11 SERIES WATER PUMP GASKET SET In stock -
331561Cat / Caterpillar 3176 SERIES UPPER GASKET KIT In stock -
331591Cat / Caterpillar 3176 SERIES WATER PUMP GASKET SET In stock -
331628Cat / Caterpillar WATER PUMP GASKET KIT In stock -
331677Cat / Caterpillar 3126 SERIES UPPER GASKET KIT In stock -
331713Cat / Caterpillar 3176 SERIES FRONT GASKET KIT In stock -
331749Caterpillar C13 Water Pump Gasket Kit In stock -
331751Cat / Caterpillar C12 ENGINES FRONT COVER GASKET KIT In stock - 381824WATER PUMP KIT View ›
- No kits match that search.
Suggested Additional Parts
Commonly sold with this product. These parts are sold separately.
| Brand | PAI Industries |
| Part Category | Seals & O-Rings |
| Sub-Type | O-Ring |
| Engine Make | Caterpillar |
| Condition | New |
| Stage / Tier | Standard |
Pack of 4.
PAI 321386 is an o-ring. PAI lists EPDM material. The listed durometer is 70. Listed cross section is 0.210 inch. Listed inside diameter is 1.225 inches. PAI describes this ring as peroxide cured. The manufacturer designates product-level OEM 7L6580.
Manufacturer product cross-references
Caterpillar 7L6580
Cummins 3003016
Compare the complete part number, material and required seal specification before ordering.
PAI Part #: 321386
OEM References:
- CATERPILLAR 7L6580
- CUMMINS 3003016
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 |
|---|
| 7L6580 |
| 3003016 |
| CATERPILLAR 7L6580 |
| CUMMINS 3003016 |
| PAI 321386 |
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.

















