Replacement O-Ring Seal for Cummins ® B/ISB/QSB Applications OEM Cross References: 3679139

Product Details

1 x Turbo Oil Supply O-Ring

Model: Cummins ISX / QSX Engine

Details:

O-Ring M16 x 1.5 Fitting Thread 0.524 in I.D. x 0.087 in Width 13.3 mm x 2.2 mm Buna N (90), Peroxide Cured

Product Description: 1x Turbo Oil Supply O-Ring

OE Replacements: 121321, 3679139, 3949781, 4333-1837803C91, 1837803, 1837803C1

Application & Fitment

• Engine Make: Cummins
• Engine Model / Application: B/ISB/QSB

Confirm the original part number and engine identification before ordering. Where applicable, also verify serial-number range, production year, piston style, bearing size or other configuration notes shown in the product information.

Part Numbers & Cross References

• OEM Cross Reference: 3679139
• Interstate-McBee Reference: M-3679139

Need Help Confirming Fitment?

Use the engine model, serial number and original part number when checking compatibility. For kits and sets, review the complete component breakdown above before ordering because contents can vary by engine configuration.