321251 Caterpillar 3406E / C15 / C16 O-Ring
Used In These Kits
This part is included in 10 engine & overhaul kits — find yours below.
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132083-100O-RING GASKET KIT In stock -
331237Cat / 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 -
331500Cat / Caterpillar C13 ENGINE FUEL GASKET KIT In stock -
331545Caterpillar C11 Fuel Gaksket Kit In stock -
331561Cat / Caterpillar 3176 SERIES UPPER GASKET KIT In stock -
331562Caterpillar 3176 Lower Gasket Set In stock -
331627Caterpillar 3176 / 3176C Central/Lower Gasket Set In stock -
831139Mack LOWER 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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331214Cat / Caterpillar TURBOCHARGER OIL DRAIN GASKET (Pack of 5) In stock -
321249Caterpillar / Fuller 3406E / C15 / C16 O-Ring In stock -
331213Cat / Caterpillar TURBOCHARGER OIL PRESSURE GASKET (Pack of 5) In stock -
431209Cat / Caterpillar TURBOCHARGER OIL DRAIN GASKET (Pack of 6) In stock -
331276Caterpillar 3406E / C15 / C16 Oil Feed Gasket 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 |
Cataloged cross-reference numbers for this product. Confirm fitment before ordering.
| Number |
|---|
| 061-7539 |
| 0617539 |
| 61-7539 |
| 617539 |
| 4965731 |
| 993664 |
| 1815561 |
| 1815561C1 |
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.