The flat faced hydraulic quick connect couplers with 3/8" Body + 3/8" NPT Thread, impoved design high flow performance and maximum service life Applications:The 3/8" flat face hydraulic coupler used in the agriculture, construction, logging industries etc,skid loader attachment,hydraulic tools,Agricultural implements,equipment attachments, drain lines,constructionindustrial hydraulic lines. Non-spill flush face valves minimize fluid losses,with 5076 PSI Rating - 12.15 GPM Max Flow Rate Made by harden steel construction with zinc nickel plating for superior corrosion resistance ,and one hand push-to-connect operation The universal 3/8" hydraulic quick connect coupler interchange with 3/8" Body ISO 16028 standard flat face couplers.