Description
MA3I –
PAI 121360 is a rectangular sealing ring that directly replaces Cummins 100099. PAI catalog data maps 121360 → 100099, and Cummins parts catalogs place 100099 in the fuel pump damper assembly. Other sources identify the same seal specifically as the fuel pump damper rectangular ring on L10/M11 applications.
Verified specifications for PAI 121360:
- Inside diameter: 1.359 in / 34.518 mm
- Cross section: 0.134 in / 3.403 mm
- Thickness: 0.134 in / 3.403 mm
- Material: Buna-N
- Durometer: 75
- Series: -220S


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