6V-3907 6V3907 SEAL O-Ring 3.53 x 183.74mm 75A FKM for Caterpillar CAT SR4 SR4B
SR4 SR4B SR4BHV. FKM rubber should not be used in applications that require resistance to water or coolant. Material Hardness: 75A. Applications: High temperature applications requiring resistance to air, fuels, lubricants and hydraulic fluids.