Electrical Connector for Fuel Surge Tank top lid This is a bulkhead grommet that fits bolt-on on Nuke and CFC units. It is made of stainless steel and also has O-rings in Viton for the best seal between surfaces. This works perfectly for those who want to conduct electricity through, for example, a fuel tank or a fire wall, as this is 100% sealed for fuel and fuel vapors. Specifications : Length : 40mm Strength : Max 125 Amps Diameter of through hole : 11.7mm Thread : M6 Material : Stainless steel Material O-ring : Viton