Mercury - Quicksilver Hose Clamp Fuel System Accessory Stainless Steel 41582Q7. Overview. Small parts can make a big difference, and the Mercury Marine 41582Q7 Quicksilver Hose Clamp is one of those details that keeps your fuel system tight and reliable. Designed for 5/16-inch (8 mm) inside diameter gray Mercury fuel line, this clamp ensures a secure, leak-free connection between hoses and fittings. Built from corrosion-resistant stainless steel, it's engineered for marine use - flexible enough