Shopping for: Confirm the part against your engine serial number and application before ordering.
Change engine
EGS-3905-021 Fuller O-RING (Pack of 5)
Commercial diesel seal & o-ring. Match the listed part and engine identifiers before ordering.
2-Year WarrantyPAI Industries
$14.95
In stock — ships same day
5 available
PAI Part #EGS-3905-021
JAK'S Part #JAKS-EGS-3905-021
Kit Membership
Used In These Kits
This part is included in 9 engine & overhaul kits — find yours below.
-
121371O-RING KIT In stock -
131684Cummins QSC ENGINES UPPER GASKET SET In stock -
131952Cummins K Lower Gasket Kit Confirm lead time -
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 -
331576Cat / Caterpillar 3300 SERIES FRONT GASKET KIT In stock -
331581Cat / Caterpillar UPPER GASKET SET In stock -
900475Fuller Rebuild Kit Confirm lead time - No kits match that search.
| Brand | PAI Industries |
| Part Category | Gaskets & Seals |
| Sub-Type | O-Ring |
Sold in a pack of 5. Price shown is for 5 pieces.
O-RING
Fits:
- FULLER 14909 SERIES
- FULLER 15210 SERIES
- FULLER V8 MACK E9 ENGINE
OEM cross-references:
- NAVISTAR 1662750C1
- FULLER 13571
- MACK 504KC117
- MACK 446GC1215
- MACK 3088-13571
- MACK 745-230850
- CUMMINS 3029820
- MACK 56AX587
Warranty: 24 months
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.









