Description
MA3H – PAI 121210 is a Buna-N O-ring used on Cummins sensor and fitting applications. PAI literature shows it used with an oil pressure switch kit, and current heavy-truck listings show it used on ISX15 fuel, EGR, air-intake, turbo, and sensor-related components.
Published dimensions are:
- Inside diameter: 0.445 in / 11.3 mm
- Cross-section: 0.087 in / 2.2 mm
- Thread/fitting application: M14 × 1.5
- Material: Buna-N
- Durometer: 90
- Finish: Peroxide cured


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