Hydraulic Qucik Connect Couplers 1/2" Body ＆ 1/2" NPT Thread ＆ 12 Sets The hardened steel with zinc-nickel plating makes our couplers resist rust, high pressures, and provide it with corrosion-resistance. The sleeve locking system makes them easy to connect. All these features make them a perfect tool for connecting hydraulic lines. Stay connected with our high quality couplers. Advanced Design Quick Connecting Hardened Steel Construction Dust Covers Included High Compatibility Key Features Advanced Design: This flat face hydraulic connect coupler set features an improved valve design, which allows for a rated pressure of 4000 PSI, 45/L high-flow, zero fluid loss, and long service life. It meets the standards of ISO 16028, perfect for connecting your hydraulic lines. Quick Connecting: The sleeve locking mechanism (with 1/2" NPT thread) makes the couplers easy to connect with a simple push. Rotate the collar to lock them tightly, preventing accidental disconnection. If you need to