... up to +600C 3. Case Material: Mild Steel Bimetal Dial Thermometer Bimetal Dial Thermometer Description:1. Indication Range: -40C up to +600C2. Case ... Nominal Diameter: 2 1/2", 3", 4", 5", 6"3 ... Bottom Connection, Center Back Male Connection6. Inlet Thread: 1/2", 1/4", 1/8", 3/8", BSP, BSPT, NPT or according ...