Busch Oil Fill Plug Gasket Part# 48202000 – vacstellar

This Busch gasket is made to exact standards. It ensures the seal is reliable for high vacuum performance. Using the correct, OEM part is crucial. The right size and copper quality matter.

You typically use this gasket when servicing your pump. Common places are between the pump chamber and the end cover, or in other critical internal joints. After cleaning or replacing parts, you must install a new copper ring.

Why copper? It’s soft enough to deform and seal perfectly. It also handles the heat and oil inside a vacuum pump very well. It won’t degrade like some materials can.

Remember, this is a single-use seal. Once compressed and removed, you should always replace it with a new one. Reusing an old copper ring can lead to vacuum leaks.