Mr O-Ring 467 Viton O-Ring 90A Durometer 19 in ID - Durable Seal

In this review the Mr O-Ring 467 Viton O-Ring is assessed for technicians and hobbyists who need a reliable, high-temperature sealing solution. The bottom line: this single-pack Viton o-ring delivers broad chemical resistance and a high 90A durometer that hold shape under pressure and heat, making it a practical choice where durability and compatibility with fuels, oils and solvents matter. The review focuses on build, materials and where this AS568-size equivalent performs best in real installations.

Key Features

• Material: Made from Viton (FKM), it offers excellent resistance to high temperature, ozone, weather and many organic solvents.
• Hardness: The 90A durometer provides a firmer seal that resists extrusion and shape change under compression.
• Temperature range: Rated from -26C to 232C (-15F to 450F), it is useful in both cold starts and very high temperature applications.
• Chemical compatibility: Performs well with petroleum products, fuels (including methanol or ethanol blends), diesel and biodiesel blends, mineral and silicone oils and greases.
• Size accuracy: Nominal and actual dimensions (19 in ID nominal; actual 18.955 in ID) match AS568 size expectations for reliable fit in standard grooves.
• Shelf life: Effectively unlimited shelf-life simplifies inventory for maintenance shops and spare parts bins.

Who It's For

This Viton o-ring is best for maintenance technicians, hydraulic and pneumatic installers, and anyone replacing seals exposed to fuels, oils or high temperatures. Its 90A hardness and broad chemical resistance suit pumps, valves and engine-related seals where a firmer compound is preferred.

Those who should look elsewhere include applications needing very soft, low-compression seals or food-grade elastomers; for low-pressure static seals where a softer durometer is required, a different compound or hardness would be a better match.

Pros & Cons

Pros

• Excellent high-temperature resistance up to 232C, suitable for hot environments.
• Broad chemical compatibility with fuels, oils and many solvents, reducing the risk of swelling or degradation.
• Accurate dimensions (actual and nominal listed) that fit AS568 sizing for predictable installation.
• Durable 90A hardness resists extrusion and maintains sealing force under compression.

Cons

• At 90A the o-ring is relatively firm, which may not seal as well in low-compression or delicate flange applications.
• Only provided as a single pack here, so shops needing bulk spares will need multiple purchases.

Specifications

Brand	Mr O-Ring
Material	Viton (FKM), 90A durometer
Nominal dimensions	19 in ID, 19-1/2 in OD, 1/4 in CS
Actual dimensions	18.955 in ID, 19.505 in OD, 0.275 in CS
Metric dimensions	481.46 mm ID, 495.44 mm OD, 6.99 mm CS
Temperature range	-26C (-15F) to 232C (450F)
Pack size	Pack of 1

Our Verdict

The Mr O-Ring 467 in 90A Viton is a solid choice for professionals who need a durable, chemically resistant seal for fuel, oil and high-temperature service. Its accurate sizing and unlimited shelf-life make it good value for maintenance shops and one-off repairs, but buyers requiring softer sealing compounds or bulk quantities should consider other options.

Frequently Asked Questions

Is this o-ring suitable for fuel systems?
Yes. The Viton formulation is compatible with petroleum fuels and blends with methanol, ethanol and biodiesel as indicated.

Will it handle high temperatures?
Yes. The o-ring is rated to 232C (450F) and performs well in very high temperature air and engine environments.

Does the pack include multiple rings?
No. This listing is for a single o-ring (pack of 1), so purchase quantities accordingly.