Mr O-Ring 216 Viton O-Ring 90A, 1-1/8 in ID (Pack of 50)

In this review the Mr O-Ring 216 Viton O-Ring is evaluated for technicians, maintenance shops and hobbyists who need durable, heat-resistant seals in quantity. The bottom line: these 90A durometer Viton o-rings offer broad chemical and temperature resistance and come in a convenient pack of 50, making them a practical choice when you need consistent, AS568-sized sealing parts for petroleum, fuel blends, hydraulic fluids or high-temperature air applications.

Key Features

• Material: Viton (FKM) construction provides excellent resistance to high temperature, ozone and many organic solvents, reducing unexpected seal failures.
• Hardness: 90A durometer balances flexibility with compression resistance so the ring maintains a seal under pressure while still conforming to mating surfaces.
• Dimensions: Nominal 1-1/8 in ID and 1-3/8 in OD with actual 1.109 in ID and 1.387 in OD, giving reliable fit for AS568 size 216 applications.
• Temperature range: Rated from -26C to 232C (-15F to 450F), allowing use in both low-temperature and very high-temperature service environments.
• Chemical compatibility: Performs well with petroleum products, diesel and biodiesel blends, methanol or ethanol blends, mineral oils, greases and many solvents.
• Pack quantity: Supplied as a pack of 50 which is convenient for routine maintenance or stocking small shops.

Who It's For

These o-rings are well suited to industrial maintenance teams, automotive and small engine technicians, HVAC and plumbing professionals who need a robust seal that tolerates heat, fuel exposure and ozone. The pack size and AS568-compatible sizing make them a sensible choice when multiple replacements are needed or when you want parts that meet standard dimensions.

Those who should look elsewhere include applications requiring very soft or very hard compounds outside 90A durometer, single custom sizes not matching AS568 216, or elastomer standards other than Viton where specific non-FKM compatibility is required.

Pros & Cons

Pros

• High temperature and chemical resistance from the Viton (FKM) material reduces downtime due to seal degradation.
• 90A durometer provides a practical balance of flexibility and durability for many sealing tasks.
• Accurate nominal and actual dimensions make these reliable replacements for AS568 size 216 locations.
• Pack of 50 offers good value and convenience for routine servicing.

Cons

• Viton can be more costly than generic nitrile for non-critical uses where extreme chemical or temperature resistance is not required.
• Not suitable where a different durometer or non-FKM compatibility is explicitly needed.

Specifications

Our Verdict

The Mr O-Ring 216 Viton O-Ring is a solid choice for professionals and serious hobbyists who need reliable, high-temperature and chemical-resistant seals in standard AS568 size 216. Its 90A durometer and pack of 50 make it good value for maintenance use, though those needing softer elastomers or non-FKM compounds should choose a different material.

Frequently Asked Questions

Are these o-rings compatible with fuels and oils?
Yes; the Viton material is designed to perform well with petroleum, diesel and biodiesel blends, mineral oils and many solvents.

Do these meet standard AS568 sizes?
Yes; the rings are intended for AS568 size 216 and the actual dimensions are listed to confirm fit.

What temperature range can they handle?
They are rated from -26C (-15F) up to 232C (450F), suitable for many high-temperature sealing needs.