The Star Mfg 2T-Y1962 BJ thermostat D-stem adaptor connects a compatible thermostat stem with its designated control interface. Measuring 21/32 inch long, this component provides a dimensional reference when identifying the correct part for maintenance or replacement. Proper adaptor fit supports the intended connection between the thermostat and its control assembly. Before ordering, ... https://partsfe.com/stem-adapter-for-star-part-2t-y1962/1-2T-Y1962.html