Historical
NFPA/T3.5.50-2009
Hydraulic fluid power - Two-, three-, and four-port screw-in cartridge valves - Cavities with UN and UNF threads
This standard specifies the dimensions relating to cavities with UN and UNF threads in which two-, three-, and four-port screw-in cartridge valves are mounted, in order to ensure dimensional interchangeability.
Content Provider
National Fluid Power Association [nfpa-fluid]