The Russell copper crush washer is made for use with 5/8-18 male fittings and Edelbrock billet, Carter or CV fuel pumps. These 0.681-inch ID copper washers create a superior crush seal between components and are supplied in pairs for a secure, leak-resistant connection. They’re intended to complement Russell adapter and hose installations where a dependable seal at the pump or fitting is required.
Russell Performance For use with 5/8-18 Male Fitting