Quick release coupling Features: *Popet valves available to prevent uncoupled leakage. *Ball valves available for rugged dependability in heacy-duty hydraulic applications,within rated working pressure. *Critical parts are induction hardened for durability. *Dependable ball-locking mechanism holds the mating halves together. *Socket and plug are precision machined from solid bar stock. *This series can be interchange with couplings meeting ISO 7241-1, Series B Interchange Standard: