This cap has secure sealing and easy finger tip operation. These caps are made 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. Size: 65 mm O.D.; Wt: 80 grams. SPRL caps are used on Europa, Compair, Glasair, Lancair, Murphy, OMF, Rocket, Velocity, Zenith and many more experimental aircraft. Manufactured by SPRL.

• 05-02611 Newton SPRL Cap O-ring Kit

What is the diameter of this SPRL fuel cap? Part # 05-28662.
The diameter of this cap is 65 mm or approx. 2.56 inches.

Can the flange be welded to the tank? What material is it?
Per the supplier: It is made out of Aluminum. It can be welded but it is anodized and will have to be properly stripped. We recommend "the flange can be riveted to an alloy skin, drill proper edge clearance in the thin skin and accept marginal clearance in the relatively thick flange."

Are replacement seals available for this lightweight non-locking SPRL fuel cap?
The replacement o-ring for this will be Part Number 05-02611.