The Stauff UDKSBG312L is a genuine UDK series hydraulic test coupling featuring an integrated check valve. Designed for reliable pressure testing in hydraulic systems, this coupling has an M16x2 connection thread and a 19 mm wrench size. It belongs to the 12L (Light) series, constructed from durable steel with a zinc/nickel-plated surface for enhanced corrosion resistance. Suitable for nominal pressures up to 630 bar (9137 PSI) and operating temperatures from -30 °C to +100 °C, ensuring robust performance in demanding applications. The seal material is NBR (Buna-N).