The Star Mfg I4-Z15484 Range Knob Assembly is a control knob supplied with a set screw and configured for a 1/4"" D-stem with the flat positioned downward. It provides a manual interface for adjusting a compatible commercial range control. The D-stem configuration allows the knob to engage with the corresponding control shaft, while the set screw secures the assembly in place during o... https://partsfe.com/knob-assembly-for-star-part-i4-z15484