1/4" BSP ISO6.3 FF Screw Connection Probe - PST4.0606.113 , BSPPInterchange: Stucchi VEP Occlusion: flat face Locking: screw Material: steel Finishing: Zn-Fe (Cr III) and Zn-Ni Available Threads: BSP, NPT, SAE Standard Seals: NBR and PU Optional Seals: FKM, EPDM Connection Under Pressure: allowed (both male or female side) Max Residual Pressure: 300 bar Interchanges with Stucchi VEP, High-tech anti-corrosion plating salt spray tested for 700 hours before any appearance of surface red rust, High working pressures, Connects and disconnects by hand up to 4,400 psi / 300 bar, Seal is blowout resistant to 4,400 psi / 300 bar when connecting or disconnecting with residual pressure. Exceeds 1,000,000 impulse cycles, Flat face design eliminates spillage upon disconnection, Thread to connect style coupling eliminates brinelling issues, Heavy duty hex nut.