Encapsulated O-Ring, FKM Part # 486515773 – vacstellar

Description

The Encapsulated O-Ring, FKM – Part #486515773 is a replacement seal. It measures 275mm x 4mm. This is not a standard O-ring. It has a soft FKM (Viton®) core wrapped inside a tough PTFE outer shell. This special design is made for the Busch COBRA NC 0400 B dry screw vacuum pump. It is a key component in the official Minor Kit and Overhaul Kit for this pump. It provides a reliable, leak-proof seal in harsh conditions.