Mr O-Ring 280 Viton O-Ring 90A Durometer 14in ID Pack of 5 - High Temp

In this review the focus is on a straightforward replacement and maintenance item: the Mr O-Ring 280 Viton o-ring in a pack of five. The bottom line is that this kit is for technicians, maintenance crews, and hobbyists who need a durable, high-temperature sealing solution that resists fuels, oils and many solvents. The reviewer found the o-rings to match nominal AS568 sizing, offer a firm 90A durometer for compressive sealing, and perform reliably across a wide temperature range, making them a practical choice for demanding sealing tasks.

Key Features

• Material: Viton (fluorocarbon rubber) provides excellent resistance to fuels, mineral oils and many organic solvents for longer seal life.
• Durometer: The 90A hardness gives a firm cross-section that holds compression well under mechanical loads and repeated cycles.
• Temperature range: Rated from -26C to 232C (-15F to 450F), it suits high-temperature air, engine and industrial applications.
• Exact sizing: Actual dimensions are provided so installers can match 13.984in ID and 14.262in OD to existing grooves for a reliable fit.
• Pack quantity: Pack of 5 supplies spare parts for routine maintenance or replacement on multiple systems without buying single pieces.
• Chemical compatibility: Performs well with petroleum, diesel, biodiesel blends, methanol or ethanol blends, and many greases and oils.

Who It's For

The Mr O-Ring 280 Viton o-ring is aimed at professionals and experienced DIYers who need a robust, high-temperature seal that complies with common AS568 sizing. It is particularly well suited for hydraulic or fuel-system repairs, industrial equipment maintenance, and any application where resistance to oils, fuels and solvents is required.

Those who should look elsewhere include users who require a much softer elastomer for low-pressure sealing or food-grade certifications not indicated here. If a different durometer or elastomer is required for extreme low-temperature flexibility, another compound would be a better fit.

Pros & Cons

Pros

• High chemical and temperature resistance from the Viton compound makes these o-rings durable in fuel and oil environments.
• Precise actual and metric dimensions allow confident matching to existing AS568 size requirements.
• 90A durometer provides a firm seal that resists extrusion and repeated compressive cycles.
• Pack of five offers immediate spares for maintenance schedules or multiple installations.

Cons

• 90A hardness may be too stiff for some low-pressure or delicate sealing applications where a softer material is preferred.

Specifications

Material	Viton (FKM)
Durometer	90A
Nominal dimensions	14in ID, 14-1/4in OD, 1/8in CS
Actual dimensions	13.984in ID, 14.262in OD, 0.139in CS
Metric dimensions	355.19 mm ID, 362.25 mm OD, 3.53 mm CS
Temperature range	-26C (-15F) to 232C (450F)
Quantity	Pack of 5

Our Verdict

The Mr O-Ring 280 Viton 90A pack is a pragmatic choice for anyone needing a tough, high-temperature seal that stands up to fuels, oils and many solvents. For maintenance crews and engineers who require AS568-compatible sizes and reliable chemical resistance, this pack represents good value because of its durability and accurate sizing; users needing softer seals should choose a different durometer.

Frequently Asked Questions

Are these o-rings compatible with fuel blends?
Yes, the Viton compound is specified to perform well with petroleum products, gasoline blends with methanol or ethanol, and diesel or biodiesel blends.

Do the o-rings meet standard sizing?
Yes, they are intended to meet AS568 size definitions and actual dimensions are listed for confirmation.

What temperatures will they tolerate?
They are rated from -26C (-15F) up to 232C (450F), suitable for high-temperature sealing applications.