471 Viton O-Ring 75A Durometer 22in ID - High Temp Chemical Seal

In this review of the 471 Viton O-Ring the bottom line is straightforward: this single-pack O-ring is aimed at technicians and DIYers who need a compact, high-temperature, chemical-resistant seal for hydraulic, fuel, or plumbing use. The reviewer found the ring's greatest strength to be its material - genuine Viton fluorocarbon - which provides broad chemical compatibility and a wide operating temperature range, making it a reliable choice when a durable, leak-resistant seal is required.

Key Features

• Material: Made from Viton (fluorocarbon elastomer) to resist fuels, oils and many industrial chemicals for longer service life.
• Temperature range: Rated from -15 degrees F to 400 degrees F so it holds seal integrity across extreme hot and cold operating environments.
• Hardness: 75A durometer provides strong resistance to penetration while still molding to mating surfaces for a reliable seal.
• Shape and size: Round cross-section with a 22in ID and 22-1/2in OD to fit cylindrical overlapping surfaces where a standard AS568A size is required.
• Standards: Manufactured to meet Aerospace Standard AS568A sizing, simplifying replacement in systems that reference industry sizes.
• Chemical compatibility: Compatible with fuels, silicone oil, aromatic and aliphatic hydrocarbons, and suitable for high vacuum, ozone and weathering exposure.

Who It's For

This O-ring is best for mechanics, maintenance technicians, and hobbyists who repair fuel systems, hydraulic fittings, injectors, or garden hose and plumbing connectors and need a single, high-performance Viton seal. It suits use cases where heat and chemical exposure are common and where AS568A sizing is expected.

Those who should look elsewhere include applications that require resistance to strong alkalis, ammonia gas or low molecular weight organic acids, since Viton can be vulnerable in those environments. Also, if a thicker cross-section or a different durometer is required, choose a different O-ring specification.

Pros & Cons

Pros

• Excellent chemical and heat resistance thanks to genuine Viton material, reducing premature failure in harsh environments.
• Wide temperature capability keeps seals effective from subzero to very high temperatures.
• Good fit and leak prevention for common applications such as injectors and hose fittings, offering clear value for money.
• AS568A sizing makes replacement straightforward in many standard systems.

Cons

• Some users note the ring feels thinner than expected, so it may not suit applications needing a heavier cross-section.
• Not suitable for service with strong alkalis, ammonia or certain organic acids where Viton compatibility is limited.

Specifications

Material	Viton (fluorocarbon elastomer)
Durometer (hardness)	75A
Cross-section	Round
Inner diameter (ID)	22in
Outer diameter (OD)	22-1/2in
Width	1/4in
Temperature range	-15 degrees F to 400 degrees F (-26 degrees C to 205 degrees C)

Our Verdict

The 471 Viton O-Ring is a solid single-pack option for anyone needing a heat- and chemical-resistant seal in standard AS568A sizes; its Viton composition and 75A hardness make it a dependable, cost-effective choice for fuel, hydraulic and general industrial uses. Buy it when chemical compatibility and temperature resistance matter, but choose a different material or thicker cross-section if your service includes strong alkalis or unusually heavy sealing loads.

Frequently Asked Questions

Is this O-ring suitable for fuel systems?
Yes - Viton is compatible with many fuels and fuels systems, making this O-ring appropriate for non-flammable hydraulic fuels and common fuel seals.

What size standard does this ring follow?
The ring is produced to meet the Aerospace Standard AS568A sizing convention used for common O-ring replacements.

Can this O-ring be used in very cold environments?
Yes - it is rated down to -15 degrees F, so it remains flexible and sealing at moderately low temperatures.