Home/Caterpillar C7 & C9 Parts/Caterpillar Buna N O-Ring, PAI 321244 (OEM 4J5477), Pack of 5
Caterpillar · Models: 3100 / C7

Caterpillar Buna N O-Ring, PAI 321244 (OEM 4J5477), 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 — confirm dispatch timing 9 available
Fitment details

Want us to check the fit? Share any details you have below. All fields are optional. Your request will be included with your order, and a specialist may contact you before fulfillment.

Secure Checkout Review Return Policy Warranty Details Ask About Same-Day Shipping
PAI Part #321244
JAK'S Part #JAKS-321244
Catalog ref199-1900
Catalog ref1991900
Catalog ref4J5477
Catalog ref7R3745
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
Kit Membership

Used In These Kits

This part is included in 6 engine & overhaul kits — find yours below.

Complete The Rebuild

Suggested Additional Parts

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

  1. Caterpillar 3100/C7 Block Side Cover Gasket, PAI  (OEM 4Y9652), Pack of 3
    331313Caterpillar 3100/C7 Block Side Cover Gasket, PAI (OEM 4Y9652), Pack of 3 In stock
    $33.42View ›
  2. Cummins ISX Valve Cover Isolator, PAI  (OEM 3104388), Pack of 4
    040104Cummins ISX Valve Cover Isolator, PAI (OEM 3104388), Pack of 4 In stock
    $34.20View ›
  3. Cummins EGR Differential Pressure Sensor, PAI  (OEM 4921728), Pack of 1
    050741Cummins EGR Differential Pressure Sensor, PAI (OEM 4921728), Pack of 1 In stock
    $110.53View ›
  4. Cummins ISX Upper Gasket Kit, PAI  (OEM 4352145)
    132058Cummins ISX Upper Gasket Kit, PAI (OEM 4352145) In stock
    $427.64View ›
  5. Cat / Caterpillar WATER PUMP GASKET KIT
    331326Cat / Caterpillar WATER PUMP GASKET KIT In stock
    $15.17View ›
Caterpillar Buna N O-Ring, PAI 321244 (OEM 4J5477), Pack of 5
BrandPAI Industries
Part CategorySeals & O-Rings
Sub-TypeO-Ring
Engine MakeCaterpillar
Engine Model3100 · C7
ConditionNew
Stage / TierStandard

PAI 321244 is a buna n o-ring for Caterpillar applications. PAI specifies Buna N construction. The manufacturer designates product-level OEM 4J5477. PAI cross-references Caterpillar 4J5477. PAI lists these application categories: Caterpillar 3100 Series, Caterpillar C7 Engine. Confirm the complete required part number before ordering.

Pack of 5.

Manufacturer product cross-references
Caterpillar 199-1900
Caterpillar 1991900
Caterpillar 7R3745
Caterpillar 8C3085
Caterpillar 99-5871
Caterpillar 995871
Caterpillar 3E6760

PAI Part #: 321244

OEM References:

  • CATERPILLAR 199-1900
  • CATERPILLAR 1991900
  • CATERPILLAR 4J5477
  • CATERPILLAR 7R3745
  • CATERPILLAR 8C3085
  • CATERPILLAR 99-5871
  • CATERPILLAR 995871
  • CATERPILLAR 3E6760

Applications:

  • CATERPILLAR 3100 SERIES
  • CATERPILLAR C7 ENGINE

Warranty: 2.0 year(s)