Description
MA3H – PAI 121425 is an EPDM O-ring used in Cummins ISX / X15 turbocharger mounting and sealing applications. PAI cross-reference data ties it directly to Cummins 3949708, and PAI’s turbo mounting gasket kit for ISX/X15 includes 121425 as one of the turbo sealing O-rings.
Published dimensions are:
- Inside diameter: 0.605 in / 14.5 mm
- Cross-section: 0.086 in / 2.2 mm
- Approx. outside diameter: 0.777 in / 19.74 mm
- Material: EPDM
- Durometer: 75
- Finish: Peroxide cured


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