This EH series is interchangeable with PARKER 6100 SERIES, DIXON W SERIES, EATON AEROQUIP 5100 SERIES, FASTER FB SERIES, VOSWINKEL HM SERIES, SNAP-TITE 78 SERIES, SAFEWAY S51 SERIES, and HANSEN 96 WING NUT SERIES. Brass Product. Brass flat-face screw couplings specifically designed for vehicle and road machinery hydraulic systems. Features an ergonomic wing sleeve for tool-free operation, enabling easy manual connection/disconnection. Compliant with US interchange standards for seamless compatibility.