This cap has secure sealing and easy finger tip operation. Manufactured from the highest quality modern engineering plastics with Viton
o-ring seals (which can be easily replaced if you should ever need to do so).
The mounting ring is anodized aluminum with the flange recessed to give a perfect flush fit whether it is riveted under a metal skin, as in the RV series, or built into a composite structure. This cap is non vented and recommended to keep the fuel in, the water out and in the locking version, other unwanted items out of your tank.
Good price. Prompt service. Courteous staff.
Per the supplier: Yes.
We do not have any experience with this cap in marine applications. It should work fine but we cannot say for sure.