Description
MA3H –
PAI 121214 is a Viton O-ring used in Cummins heavy-duty engine applications, including 855 Series and N14 upper gasket sets. PAI directly lists Cummins 131026 as the primary OEM reference.
PAI/Fitment data gives the seal dimensions as approximately 0.301 in (7.65 mm) I.D. × 0.070 in (1.78 mm) cross-section, with 75-durometer Viton material and AS568 size -011.


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