Description
This O-ring is made from FKM, which is also known by the brand name Viton. It is a high-performance rubber that is specially chosen for vacuum pumps. This O-ring is a direct fit for the Busch COBRA NC 0400B and NC 0630B dry screw vacuum pumps.
In fact, this O-ring is a critical component of the official Busch COBRA NC 0400B Overhaul Kit. That kit uses two of these O-rings to ensure a complete and reliable seal. So, you can be confident this part is exactly what your pump needs.
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