Hydraulic Quick Connect Hose Coupling, Socket, FEM Series, Steel, Coupling Size 1/2 in, Male, Max. Working Pressure @ 70 F 3,625 psi, Max. Flow Rate 45.42 lpm FEM Series hydraulic quick-connect coupling bodies are the female end of coupling sets. Also called sockets, they accept coupling plugs (nipple or male ends) for tools and fluid lines requiring quick connection and disconnection without fluid loss.FEM Series hydraulic quick-connect couplings feature a flush-face valve design with double shutoff that eliminates fluid spillage and air inclusion when connecting and disconnecting. FEM Series push-to-connect couplings meet ISO 16028 and are used with hydraulic tools, skid loader attachments, and agricultural machinery.