Quick-Lok threadless couplings eliminate hydraulic leaks, reduce warranty claims and increase assembly line productivity for OEMs. They are designed for use with one- and two-wire standard SAE 100R1 and R2 hoses. The stem is made of hardened steel machined to extremely tight tolerances. The Quick-Lok coupling combines a double O-ring stem-to-adapter interface and a snap ring in the adapter that eliminates manifold and port leak paths. The coupling resists impulse shocks and side loading, and it cannot be inadvertently disconnected or released under pressure.