Description
MA3H –
PAI 121288 is a rectangular Buna-N sealing ring used in Cummins fuel-pump applications. PAI and current distributor data cross it directly to Cummins 3935032, with older Cummins references 3910503 and 3930993 also tied to the same seal.
Published dimensions are 3.000 in I.D. × 0.125 in cross-section × 0.125 in thick (76.2 × 3.175 × 3.175 mm), Buna-N 75 durometer, red stripe.


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