464 Viton O-Ring 75A Durometer 17-1/2ft ID 18ft OD - High Temp Seal

In this review of the 464 Viton O-Ring the bottom line is straightforward: this single brown Viton ring is aimed at technicians and hobbyists who need a durable, chemical-resistant seal that fits common aerospace sizes. The reviewer found it most valuable where heat, fuel or solvent resistance matters and where a precision fit matters, such as injector seats, garden fittings, and hose joints. Its compliance with the AS568A sizing standard and a wide usable temperature range make the ring a practical choice for service environments that expose seals to fuels, oils and ozone.

Key Features

• Material: Made of Viton fluorocarbon elastomer which provides strong resistance to fuels, aromatic and aliphatic hydrocarbons and many chemicals.
• Temperature range: Rated from -15 degrees F to 400 degrees F so it holds sealing properties across extreme heat and cold conditions.
• Hardness: 75A durometer offers a balance of flexibility and resistance to penetration for reliable compression set performance.
• Cross-section: Round profile designed to create a consistent seal between overlapping cylindrical surfaces, reducing the risk of leaks when installed correctly.
• Standard sizing: Conforms to Aerospace Standard AS568A so it matches common O-ring ID/OD sizes for straightforward replacement.

Who It's For

The 464 Viton O-Ring is best for mechanics, maintenance techs, and DIY users who need a single, high-temperature, fuel-resistant seal for applications like engine injectors, fuel fittings, garden hose connectors, and pneumatic or hydraulic components. Its material choice makes it suitable where exposure to fuels, silicone oil and ozone are expected.

Customers who need food-grade elastomers, resistance to strong alkalis or ammonia gas, or large production quantities should look elsewhere, since this listing is for a single standard Viton ring and Viton has known vulnerabilities to certain bases and low molecular weight organic acids.

Pros & Cons

Pros

• Good chemical and fuel resistance that suits a wide range of service fluids.
• Wide operating temperature range for use in harsh thermal environments.
• AS568A sizing makes replacement and fit straightforward for compatible components.
• Reported by users to prevent leaks and provide reliable fit for common fittings.

Cons

• Some buyers report the cross-section feels thinner than expected for certain applications, so check thickness against the intended gland before ordering.
• Not suitable for environments with strong alkalis, ammonia gas or certain organic acids where Viton compatibility is limited.

Specifications

Our Verdict

For anyone replacing a critical O-ring in an engine, fuel system or outdoor fitting this 464 Viton O-Ring is a sensible single-item purchase: it offers proven chemical and heat resistance, standard aerospace sizing for compatibility, and a balanced 75A hardness for sealing. Buyers should verify gland clearance and avoid applications involving strong alkalis or ammonia to ensure long service life.

Frequently Asked Questions

Is this O-ring fuel and oil resistant?
Yes, Viton is compatible with many fuels, aromatic and aliphatic hydrocarbons, and silicone oils, making it suitable for fuel and oil sealing.

What temperatures can it handle?
The ring is rated for use from -15 degrees F up to 400 degrees F for high temperature stability.

Will it fit my replacement need?
It follows AS568A sizing with a 17-1/2 in ID and 18 in OD; confirm those dimensions match your gland before installing.