... Face(FF), Raised Face(RF), Tongue(T), Groove(G), Female(F), Male(M), Ring Joints Face(RJ)European Series: Type A(Flat ... Face), Type B(RaisedFace), Type C(Tongue), Type D(Groove), Type E ... (Spigot), Type F(Recess), Type G(O-Ring Spigot), Type H (O-Ring Groove)Industries ServedElectrical power, petroleum, natural gas, chemical, shipbuilding ...