Pai 121337 Cummins 3977393 O-Ring

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O-Ring 0.118 in C/S x 0.826 In I.D. 3 mm C/S x 21 mm I.D. Viton (75) Part number: 121337 OE MFG: CUMMINS OEM Reference: 3977393 Cross Reference: CUMMINS : 3977393; OTHER : BS4518-0 215-30 | INTERSTATE-MCBEE : M-3977393; PAI : 121337OEM Product Class: Engine Gaskets, O-rings & Gasket Sets Show more