Cummins 3918188 is a genuine 8mm sealing washer used on 8mm banjo fittings in the 5.9L Cummins fuel system. It fits 1989-1998 12-valve trucks.

These washers crush to seal, so they should not be reused. Having fresh ones on hand makes lift pump, filter and fuel line work go smoother.

• Genuine Cummins: OEM sealing washer.
• 8mm Size: For 8mm banjo fittings.
• Used in Pairs: One washer goes on each side of the banjo fitting.
• Common Service Part: Handy for lift pump, filter and fuel line service.

Technical Specifications

• Part Number: 3918188
• Inside Diameter: 8 mm
• Outside Diameter: 13.49 mm
• Thickness: 1.3 mm
• Core Requirement: No core required

Vehicle Fitment & Technical Installation Notes

• Fitment: 1989-1998 Dodge Ram with the 5.9L 12-valve Cummins
• Installation Tip: Use a new washer on both sides of the banjo fitting every time the fitting is taken apart.