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All Parts 14749
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O-RING
Detroit DIESEL DD15
621247 Detroit O-Ring
5F7054 · A4729970545
JAK'S JAKS-621247
In Stock — Ships Today
$6.32
O-RING
Detroit DIESEL DD15
621248 Detroit O-Ring
A0289978145 · A4729970745
JAK'S JAKS-621248
In Stock — Ships Today
$21.78
O-RING
Detroit DIESEL 60 DETROIT
621250 Detroit O-Ring
23527272
JAK'S JAKS-621250
In Stock — Ships Today
$47.80
O-RING
Detroit DIESEL 60 DETROIT
621254 Detroit O-Ring
6V-5759 · 6V5759
JAK'S JAKS-621254
In Stock — Ships Today
$9.10
O-RING
Detroit DIESEL DD15
621259 Detroit O-Ring
A0309979045 · A4729970845
JAK'S JAKS-621259
In Stock — Ships Today
$6.82
SEAL RING
Detroit DIESEL DD13
621286 Detroit Seal Ring
A4721881080 · A4721880080
JAK'S JAKS-621286
In Stock — Ships Today
$37.42

Choosing the Right Products

Heavy-duty diesel components must be matched to the exact engine and application. Before ordering from this collection, verify the part number, engine model, engine serial number, and any casting or calibration number shown on the original component.

Fitment information to have ready

  • OEM, dealer, casting, or interchange part number
  • Engine manufacturer, model, and engine serial number (ESN)
  • Truck year and model when the component is chassis-specific
  • Core details for remanufactured or exchange components

Need a fitment check?

Use the OEM cross-reference tool or text a clear photo of the part tag to (720) 445-6249. A JAK'S Diesel specialist can confirm the match before the part ships.

Got a Number We Don't List?

Text a photo of the part tag — a specialist crosses it and quotes you fast.

Text a Part-Tag Photo(720) 445-6249