Description
MA3I – PAI 121211 is an EPDM O-ring used across multiple Cummins heavy-duty engine applications. PAI directly identifies Cummins 109080 as the OEM reference, and PAI kit documentation shows 121211 used in Cummins 855, M11/ISM, and ISX12 gasket kits, PAI lists the seal as AS568 size -214, with a 0.984 in / 24.99 mm inside diameter and 0.139 in / 3.53 mm cross-section. Material is 75-durometer EPDM


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