... steel Dial Diameter: 6" rear threa Industrial Bimetallic Thermometer, Series YY-T-05, Dial 6" (150mm) OverviewYY-T-05 series industrial ... LIMITS Up to 250ºF, 100%; 250º to 550ºF, 50%; 550º to 1000ºF, continuous use up to 800ºF ... , intermittent use over 800ºF. Industrial Bimetallic Thermometer, Series YY-T-05, Dial 6" (150mm)