Home/Caterpillar C7 & C9 Parts/Caterpillar Buna N O-Ring, PAI 321254 (OEM 4F9029), Pack of 5
O-RING
Caterpillar · Models: 3100 / C7

Caterpillar Buna N O-Ring, PAI 321254 (OEM 4F9029), Pack of 5

Commercial diesel seal & o-ring. Match the listed part and engine identifiers before ordering.
2-Year WarrantyPAI Industries
$14.95$16.00 Save $1.05
In stock — confirm dispatch timing 2 available
Fitment details

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PAI Part #321254
JAK'S Part #JAKS-321254
Catalog ref05-8547
Catalog ref058547
Catalog ref4F9029
Catalog ref78-1962
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Kit Membership

Used In These Kits

This part is included in 4 engine & overhaul kits — find yours below.

Complete The Rebuild

Suggested Additional Parts

Commonly sold with this product. These parts are sold separately.

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  4. Caterpillar 3116 Compressor Mounting Gasket, PAI (OEM 1359819), Pack of 5
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Caterpillar Buna N O-Ring, PAI 321254 (OEM 4F9029), Pack of 5
BrandPAI Industries
Part CategorySeals & O-Rings
Sub-TypeO-Ring
Engine MakeCaterpillar
Engine Model3100 · C7
ConditionNew
Stage / TierStandard

Pack of 5.

PAI 321254 is a Buna N o-ring; PAI specifies a 1.171-inch inside diameter and 0.139-inch cross section. The manufacturer-designated reference is Caterpillar OEM 4F9029.

Compatible Engines

PAI lists Caterpillar 3100 Series; Caterpillar C7 Engine applications. Match the original part number and listed application.

PAI lists these manufacturer references: Caterpillar 05-8547; Caterpillar 058547; Caterpillar 4F9029; Caterpillar 78-1962; Caterpillar 781962; Caterpillar 8T7286; Detroit Diesel A0179978845; Freightliner Truck Parts DDEA0179978845.

Compare the complete part number and required specification before ordering.

PAI Part #: 321254

OEM References:

  • CATERPILLAR 05-8547
  • CATERPILLAR 058547
  • CATERPILLAR 4F9029
  • CATERPILLAR 78-1962
  • CATERPILLAR 781962
  • CATERPILLAR 8T7286
  • DETROIT DIESEL A0179978845
  • FREIGHTLINER TRUCK PARTS DDEA0179978845

Applications:

  • CATERPILLAR 3100 SERIES
  • CATERPILLAR C7 ENGINE

Warranty: 2.0 year(s)