Restore the air tight and water tight seal on your deck fill caps with Captain O-Ring's replacement marine deck fill cap o-rings. Designed to fit deck fill caps with a 1-1/2” thread OD (outside diameter at the cap threads). These o-rings feature an inside diameter of approximately 1-1/2”, a thickness of just over 1/8”, and an outside diameter just over 1-3/4”. Compatible with Perko part number 0513DP8.
Important: Make sure to measure your fill cap before ordering to confirm the dimensions above match it.
Molded from heavy duty Buna Nitrile rubber, these deck fill cap o-rings are impervious to gasoline, diesel, and fuel treatments while being safe for contact with water and waste.
Package includes five (5) o-rings. Replace your old, worn, leaking o-ring and have spares on hand for the future.
Manufactured and warrantied by Captain O-Ring LLC. Proudly assembled in the USA!