Pre installed O rings ensures a tight, leakproof sealing between the threaded hose and pumps, maintaining consistent water flows under high pressure Made from resistant brass with precisions cut threads for durability and reliability in demanding cleaning tasks Designed with M20 external threads for pumps connection and internal threads for hose attachment, these fittings ensures straightforward setup without leaks These brass pumps outlet fittings provide a fast solution for replacing worn, rusty, or clogged parts on commercial and residential pressure washers, restoring machine function efficiently Features a unique hexagonal shape requiring an 8mm hexagonal for installation, enhancing and accidental loosening during use