The OHMITE 5103AE is a bar knob, a crucial hardware component used with Ohmite rheostats and tap switches. These knobs are designed to be fastened to shafts using slotted set screws, ensuring a secure and reliable connection. Compatible with models H, J, G, K, and L, the 5103AE provides a comfortable grip and contributes to the overall functionality of the equipment. These knobs are essential for precise control and operation in industrial settings.