TE Connectivity SOLISTRAND STRATO-THERM High Temperature Ring Tongue Crimp Terminals SOLISTRAND STRATO-THERM high temperature ring tongue crimp terminals for use where operating temperatures prevent standard insulated crimps being used. These STRATO-THERM high temperature ring tongue crimp terminals are made from solid nickel and designed to terminate solid and/or stranded conductors. When the terminal is crimped the wire inside is forced into the serrations or dimples of the barrel to maximise the electrical contact area after crimping. The maximum operating temperature for these STRATO-THERM high temperature ring tongue crimp terminals is 649°C (1200°F).