$3.92
This is the official Busch O-Ring made of FKM (Fluoroelastomer) material (Part #0486000638). FKM is a high-performance synthetic rubber known for exceptional resistance to extreme temperatures, chemicals, fuels, and oils . This O-ring is used in various Busch R5 series vacuum pump models and ensures a reliable seal for fluid and gas containment .
O-Ring,FKM
O-Ring,FKM
This rubber is different. This is FKM.
This is the Busch FKM O-Ring. The part number is 0486000638.
FKM is the technical name for a type of synthetic rubber. You may also hear it called by the brand name “Viton.” FKM stands for Fluoroelastomer .
FKM is special because it can handle things that destroy regular rubber:
High temperatures – Much hotter than standard rubber
Harsh chemicals – Oils, fuels, acids, and solvents
Weather and ozone – Sunlight and weather do not damage it
Vacuum pressure – It holds its shape even under strong vacuum
Standard rubber o-rings (like Buna-N) can swell, crack, or melt in these conditions. FKM keeps working .
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10 in stock
10 in stock
10 in stock
10 in stock
10 in stock
10 in stock
10 in stock
10 in stock
10 in stock
10 in stock
10 in stock
10 in stock
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