321288 Caterpillar O-Ring | PAI

O-RINGPAI Part #: 321288OEM References: CATERPILLAR 061-8639 CATERPILLAR 0618639 CATERPILLAR 61-8639 CUMMINS 4928599 MACK 4333-1887474C1 NAVISTAR 1887474 NAVISTAR 1887474C1 Applications: CATERPILLAR 3406E SERIES CATERPILLAR C15 ENGINE CATERPILLAR C16 ENGINES CATERPILLAR C18 ENGINE Warranty: 2.0 year(s)

Warranty BackedPAI IndustriesFree Freight

JAK'S Part #JAKS-PAI-321288

Cross Ref061-8639

Cross Ref0618639

Cross Ref61-8639

Cross Ref4928599

$3.99

In Stock — Ships Today if ordered by 3:00 PM MT

Secure Checkout 30-Day Returns Warranty Backed Ships Same Day

Not sure it's the right fit? Call a specialist

(720) 445-6249

Talk to a tech or text a photo of your part tag — we'll confirm fitment before you buy

Brand	PAI Industries
Part Category	Seals & O-Rings
Engine Make	Caterpillar
Engine Model	3406E · C15 · C16 · C18
Condition	New
Stage / Tier	Standard

O-RING

PAI Part #: 321288

OEM References:

CATERPILLAR 061-8639
CATERPILLAR 0618639
CATERPILLAR 61-8639
CUMMINS 4928599
MACK 4333-1887474C1
NAVISTAR 1887474
NAVISTAR 1887474C1

Applications:

CATERPILLAR 3406E SERIES
CATERPILLAR C15 ENGINE
CATERPILLAR C16 ENGINES
CATERPILLAR C18 ENGINE

Warranty: 2.0 year(s)

This part supersedes and cross-references the following OEM, dealer, and competitor numbers. Searching any of these will land here.

Number
061-8639
0618639
61-8639
4928599
4333-1887474C1
1887474
1887474C1

Don't see your number? We cross 1M+ OEM, dealer and competitor part numbers daily. Call or text (720) 445-6249 and a tech will match it by hand.

Caterpillar 3406E C15 C16 C18

Warranty Backed. Every part is covered against defects in materials and workmanship. Call a specialist for the coverage details on this part.

Complete The Job