Lightning-Safe Aircraft Fuel Tank

lightning-safe gravity fuel filler caps are used to lock, seal, and act as an identifier for the gravity fill port of an aircraft fuel tank. The advantages of Parker’s gravity fuel filler cap include the use of a lightweight composite base that meets current lightning-safe standards, O-rings with a fluorosilicone seal, and a lanyard made of polyurethane. Non-lightning-safe caps have lanyards of varied material and type, such as chain links and cables.