Fluorocarbon (FKM) 90 Durometer Hydraulic Boss O-Ring
Engineered for the most demanding hydraulic applications, this Fluorocarbon (FKM) O-Ring delivers exceptional sealing performance where standard elastomers fall short. With a 90 Shore A durometer hardness, it provides superior resistance to extrusion under high-pressure conditions, making it the go-to choice for hydraulic boss port fittings in industrial and mobile hydraulic systems.
Key Benefits
Outstanding chemical resistance — withstands petroleum-based hydraulic fluids, synthetic fluids, fuels, and aggressive chemicals that degrade standard nitrile seals
High-temperature performance — maintains sealing integrity across a wide temperature range, typically -20°F to +400°F (-29°C to +204°C)
90 durometer hardness — firm compound minimizes extrusion and blow-out in high-pressure hydraulic circuits
Boss port compatible — precision-molded to SAE/AS568 dimensional standards for reliable face sealing in straight-thread O-ring boss (ORB) fittings
Low compression set — retains sealing force over extended service life, reducing maintenance intervals
Typical Applications
Hydraulic pumps, motors, and valves
High-pressure fluid connectors and manifolds
Mobile hydraulic equipment
Industrial machinery exposed to aggressive fluids or elevated temperatures
