Caterpillar Rectangular Sealing Ring, PAI 321342 (OEM 4P9388), Pack of 6
Used In These Kits
This part is included in 2 engine & overhaul kits — find yours below.
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331627Caterpillar 3176 / 3176C Central/Lower Gasket Set In stock -
361608Caterpillar 3176 Liner 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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321311Caterpillar Rectangular Sealing Ring, PAI (OEM 6I3549) In stock -
331561Cat / Caterpillar 3176 SERIES UPPER GASKET KIT In stock -
370205Cat / Caterpillar 3176 SERIES ROD BEARING In stock -
331219Caterpillar 3176/C10/C12 Oil Pan Gasket, PAI (OEM 1095308), Pack of 1 In stock -
305060Caterpillar C10 / 3176 Piston Ring Set In stock
| Brand | PAI Industries |
| Part Category | Seals & O-Rings |
| Engine Make | Caterpillar |
| Engine Model | 3176 |
| Condition | New |
| Stage / Tier | Standard |
Pack of 6.
PAI 321342 is a rectangular sealing ring. PAI specifies EPDM (75), peroxide cured, with a dark purple Teflon coat. Listed dimensions are 5.75-inch inside diameter, 0.143-inch cross section and 0.395-inch thickness. The manufacturer designates product-level OEM 4P9388.
Compatible Engines
PAI lists Caterpillar 3176 Series. Match the complete required part number and listed application before ordering.
Manufacturer product cross-references
Caterpillar 4P9388
Caterpillar 9Y7043
Compare the complete part number, material and required seal specification before ordering.
PAI Part #: 321342
OEM References:
- CATERPILLAR 4P9388
- CATERPILLAR 9Y7043
Applications:
- CATERPILLAR 3176 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 |
|---|
| 4P9388 |
| 9Y7043 |
| CATERPILLAR 4P9388 |
| CATERPILLAR 9Y7043 |
| PAI 321342 |
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.







